{"title":"WEIL MCLAIN","description":"","products":[{"product_id":"weil-mclain-560-528-989-orifice","title":"Weil McLain 560-528-989 Orifice","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 560-528-989 Burner Orifice\u003c\/strong\u003e is a precision-engineered \u003cstrong\u003eOEM replacement part\u003c\/strong\u003e designed specifically for \u003cstrong\u003enatural gas boiler\u003c\/strong\u003e manifold assemblies. As a veteran-grade \u003cstrong\u003eHVAC orifice\u003c\/strong\u003e, it features a \u003cstrong\u003e#46 drill size\u003c\/strong\u003e essential for maintaining the correct \u003cstrong\u003egas flow rate\u003c\/strong\u003e and \u003cstrong\u003eBTU input\u003c\/strong\u003e across the burner rack. This \u003cstrong\u003e7\/16\" hex\u003c\/strong\u003e component is built with a \u003cstrong\u003e1\/8\" NPT\u003c\/strong\u003e thread, ensuring a secure, leak-free seat within the gas manifold of various \u003cstrong\u003eWeil McLain CGi\u003c\/strong\u003e and \u003cstrong\u003eCGa series boilers\u003c\/strong\u003e. Proper \u003cstrong\u003eorifice sizing\u003c\/strong\u003e is critical for achieving optimal \u003cstrong\u003ecombustion efficiency\u003c\/strong\u003e and preventing hazardous carbon monoxide buildup or burner soot. When \u003cstrong\u003etroubleshooting boiler burner\u003c\/strong\u003e issues or converting high-altitude units, technicians rely on this \u003cstrong\u003eburner spud\u003c\/strong\u003e for its exacting tolerances. Replacing worn or clogged \u003cstrong\u003eboiler orifices\u003c\/strong\u003e restores the \u003cstrong\u003egas manifold pressure\u003c\/strong\u003e to manufacturer specifications, ensuring reliable \u003cstrong\u003eignition\u003c\/strong\u003e and stable flame patterns across the entire heat exchanger.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision Metering:\u003c\/strong\u003e The \u003cstrong\u003e#46 drill size\u003c\/strong\u003e ensures the exact \u003cstrong\u003enatural gas\u003c\/strong\u003e delivery required for compatible \u003cstrong\u003eWeil McLain\u003c\/strong\u003e boiler models.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustrial Construction:\u003c\/strong\u003e Durable brass \u003cstrong\u003e7\/16\" hex\u003c\/strong\u003e body resists corrosion and simplifies installation using standard service tools.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Compatibility:\u003c\/strong\u003e Specifically engineered for \u003cstrong\u003eWeil McLain 560-528-989\u003c\/strong\u003e specifications, fitting \u003cstrong\u003e1\/8\" NPT\u003c\/strong\u003e manifold ports perfectly.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCombustion Stability:\u003c\/strong\u003e Maintains consistent \u003cstrong\u003eburner performance\u003c\/strong\u003e and prevents inefficient fuel-to-air ratios.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions:\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWhat boilers use the 560-528-989 orifice?\u003c\/strong\u003e This part is widely used in \u003cstrong\u003eWeil McLain CGi and CGa series\u003c\/strong\u003e residential gas boilers. Always verify your boiler's \u003cstrong\u003eBTU rating\u003c\/strong\u003e and altitude requirements before installation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCan this be used for LP conversion?\u003c\/strong\u003e No, this is a \u003cstrong\u003enatural gas orifice\u003c\/strong\u003e. Converting to propane requires a different drill size (typically a #56) to handle the higher energy density of LP gas.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHow do I check for a clogged orifice?\u003c\/strong\u003e Inspect the \u003cstrong\u003eburner spud\u003c\/strong\u003e for debris or carbon buildup. If the \u003cstrong\u003e#46 drill\u003c\/strong\u003e opening is obstructed, the burner may experience delayed ignition or uneven heating.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35643246540,"sku":"560-528-989","price":13.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Image_d884826b-18e4-422b-b680-78f524881062.png?v=1792529808"},{"product_id":"weil-mclain-590-317-599-ignitor-gasket","title":"Weil McLain 590-317-599 Ignitor Gasket","description":"\u003cp\u003eMaintaining a gastight combustion seal is critical when servicing high-efficiency equipment like AHE and GV series boilers. The \u003cstrong\u003eWeil McLain 590-317-599 Ignitor Gasket\u003c\/strong\u003e is a precise OEM replacement designed to withstand the extreme thermal cycling of the combustion chamber. As a seasoned tech, you know that reuse of brittle, compressed gaskets leads to nuisance lockouts or dangerous flue gas bypass. This high-temperature \u003cstrong\u003ecombustion seal\u003c\/strong\u003e ensures the ignitor remains seated correctly, protecting the integrity of your \u003cstrong\u003eboiler maintenance\u003c\/strong\u003e and ensuring \u003cstrong\u003eHVAC part compatibility\u003c\/strong\u003e across multiple GV, GV90+, and AHE configurations.\u003c\/p\u003e\n\n\u003cp\u003eEngineered for professional-grade \u003cstrong\u003eheating system repair\u003c\/strong\u003e, this component provides the exact tolerances required to prevent gas leakage at the ignition point. Whether you are performing an annual clean-out or a full ignitor swap, replacing the \u003cstrong\u003eWeil McLain burner gasket\u003c\/strong\u003e is a standard best practice to avoid callbacks. Focus on your \u003cstrong\u003eburner assembly service\u003c\/strong\u003e with confidence, knowing this OEM part provides the reliable thermal barrier necessary for modern condensing boiler operations.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOptimized Heat Resistance:\u003c\/strong\u003e Fabricated from durable, high-temperature materials specifically for Weil McLain combustion environments.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eZero-Leak Sealing:\u003c\/strong\u003e Critical for maintaining proper gas-to-air ratios and preventing carbon monoxide leakage.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBroad Compatibility:\u003c\/strong\u003e Drop-in fit for Weil McLain AHE, GV, and GV90+ series gas-fired boilers.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eReliable Ignition:\u003c\/strong\u003e Ensures stable ignitor positioning for consistent flame sensing and ignition cycles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions:\u003c\/strong\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIs this gasket compatible with the GV90+ series?\u003c\/strong\u003e Yes, this part is the direct OEM specification for GV90+ units as well as older AHE and GV models.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eShould I replace the gasket every time I inspect the ignitor?\u003c\/strong\u003e Yes, once compressed and heat-cycled, the gasket loses its ability to reseal effectively; replacement is required during every service.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWill this seal prevent \"Ignition Failure\" codes?\u003c\/strong\u003e By ensuring no air infiltration or gas bypass occurs at the ignitor mounting flange, it eliminates one of the most common physical causes of ?? errors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong style=\"color: red;\"\u003eThis item is not eligible for free shipping.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35643246732,"sku":"590-317-599","price":13.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_7cf68116-0cd2-461b-bd91-dd8b8de11566.png?v=1755718727"},{"product_id":"weil-mclain-560-528-997-orifice","title":"Weil McLain 560-528-997 Burner Orifice","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 560-528-997 Burner Orifice\u003c\/strong\u003e is a high-precision \u003cstrong\u003enatural gas burner orifice\u003c\/strong\u003e engineered for exact fuel metering in residential and light commercial cast iron boilers. This \u003cstrong\u003eOEM Weil McLain replacement part\u003c\/strong\u003e features a 2.0mm drill size and is machined from high-grade brass to withstand the thermal stresses of continuous combustion. It is compatible with \u003cstrong\u003eWeil McLain CG, CGA, and CGi boilers\u003c\/strong\u003e, ensuring a stoichiometric air-fuel ratio that maintains peak BTU output and steady-state efficiency. With a \u003cstrong\u003e1\/8\" NPT thread\u003c\/strong\u003e and a 7\/16\" hex head, this component allows for secure torque and leak-free installation on the burner manifold. For technicians troubleshooting intermittent pilot or standing pilot systems, replacing a clogged or oxidized orifice with this \u003cstrong\u003egenuine 560-528-997 assembly\u003c\/strong\u003e restores factory-spec flame patterns and prevents carbon buildup. Using original equipment ensures the gas delivery system remains calibrated to the heat exchanger’s design capacity, preventing dangerous over-firing or inefficient operation.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision Metering:\u003c\/strong\u003e Factory-drilled 2.0mm aperture ensures consistent manifold pressure and optimal burner performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect OEM Fit:\u003c\/strong\u003e Drop-in replacement for the \u003cstrong\u003eWeil McLain 560-528-997\u003c\/strong\u003e, eliminating the need for field modifications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustrial Build:\u003c\/strong\u003e Corrosion-resistant brass construction handles high operating temperatures without deformation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBoiler Compatibility:\u003c\/strong\u003e Verified for use across the CG, CGa, and CGi series gas-fired boilers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eIs this orifice compatible with Propane (LP) systems?\u003c\/strong\u003e\u003cbr\u003e\nNo, the 560-528-997 is specifically sized at 2.0mm for natural gas flow rates. For liquid propane applications, you must use the correctly sized LP orifice (typically part 560-528-998) to prevent hazardous combustion conditions.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat are the physical dimensions for manifold fitment?\u003c\/strong\u003e\u003cbr\u003e\nThis part features a standard 1\/8\" NPT male thread and a 7\/16\" hex for easy installation with a standard nut driver or socket.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I clean my old orifice instead of replacing it?\u003c\/strong\u003e\u003cbr\u003e\nWhile cleaning is possible, any scratching or enlargement of the 2.0mm bore during maintenance will alter the gas flow. Replacing with a new \u003cstrong\u003eWeil McLain burner orifice\u003c\/strong\u003e is the only way to ensure the boiler fires at its rated efficiency.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35643327564,"sku":"560-528-997","price":13.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_cbd80a05-8017-4a64-9d70-4a948dd5dc82.png?v=1755718726"},{"product_id":"weil-mclain-560-528-980-orifice","title":"Weil McLain 560-528-980 Pilot Orifice","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 560-528-980 Pilot Orifice\u003c\/strong\u003e is a precision-engineered \u003cstrong\u003eOEM replacement part\u003c\/strong\u003e specifically calibrated for \u003cstrong\u003enatural gas (NG)\u003c\/strong\u003e applications. Featuring a precise \u003cstrong\u003e.018\" diameter\u003c\/strong\u003e aperture, this component is critical for maintaining the specific gas-to-air ratio required for stable \u003cstrong\u003epilot flame\u003c\/strong\u003e ignition in \u003cstrong\u003eWeil McLain EG boilers\u003c\/strong\u003e and CG series units. A fouled or incorrect orifice can lead to weak pilot signals, frequent nuisance lockouts, or delayed ignition, making the \u003cstrong\u003e560-528-980\u003c\/strong\u003e essential for routine burner manifold maintenance. Built from durable, industrial-grade materials, this \u003cstrong\u003enatural gas pilot orifice\u003c\/strong\u003e ensures consistent flow regulation to the pilot burner assembly, supporting the overall combustion efficiency and safety of the hydronic system. When troubleshooting \u003cstrong\u003eWeil McLain boiler parts\u003c\/strong\u003e, verifying the orifice size is a mandatory step for contractors to ensure compliance with the original manufacturer's firing rate specifications. This genuine part provides the exact tolerance needed for professional-grade service and reliable cold-weather performance.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecise .018\" Orifice:\u003c\/strong\u003e Machined to exact tolerances to ensure a stable, consistent pilot flame for reliable ignition.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Compatibility:\u003c\/strong\u003e Specifically designed for \u003cstrong\u003eWeil McLain natural gas\u003c\/strong\u003e equipment, including \u003cstrong\u003eEG-series boilers\u003c\/strong\u003e and standing pilot systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptimized Combustion:\u003c\/strong\u003e Helps maintain proper gas flow, preventing carbon buildup and reducing the risk of \u003cstrong\u003epilot burner\u003c\/strong\u003e failure.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustrial Construction:\u003c\/strong\u003e Resists the corrosive effects of constant heat and gas exposure for long-term field reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eIs this orifice compatible with Propane (LP) systems?\u003c\/strong\u003e\u003cbr\u003e\nNo, the \u003cstrong\u003e560-528-980\u003c\/strong\u003e is exclusively for \u003cstrong\u003enatural gas (NG)\u003c\/strong\u003e. Using a .018\" orifice for propane will result in over-firing and a dangerous \u003cstrong\u003epilot flame\u003c\/strong\u003e; propane systems typically require the smaller .010\" orifice (part 560-528-985).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhen should the pilot orifice be replaced?\u003c\/strong\u003e\u003cbr\u003e\nTechnicians should replace the orifice if the \u003cstrong\u003epilot light\u003c\/strong\u003e appears lazy or yellow, or if repeated cleaning of the existing component does not restore a crisp blue flame and a strong millivolt signal.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this fit all Weil McLain boilers?\u003c\/strong\u003e\u003cbr\u003e\nThis part is widely used in residential and commercial models like the EG series and CG series (Series 4-12) with standing pilots. Always verify the part number against your specific unit's rating plate or manual before installation.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35643345036,"sku":"560-528-980","price":27.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Image_0009b3c0-c706-46ab-b501-aeb7084ff3ac.png?v=1793912256"},{"product_id":"weil-mclain-590-300-003-gasket","title":"Weil McLain 590-300-003 Gasket","description":"\u003cp\u003eFor mid-to-high efficiency hydronic systems, maintaining a gas-tight seal at the blower interface is critical to preventing combustion bypass and maximizing thermal transfer. The \u003cstrong\u003eWeil McLain 590-300-003 Rubber Blower Gasket\u003c\/strong\u003e is a precision-engineered \u003cstrong\u003eOEM replacement part\u003c\/strong\u003e specifically designed for \u003cstrong\u003eWeil McLain Ultra Gas boilers\u003c\/strong\u003e, including the Ultra 550 and 750 series. This \u003cstrong\u003eHVAC blower seal\u003c\/strong\u003e is fabricated from high-grade synthetic rubber, providing the necessary resilience to withstand the thermal cycling and chemical exposure typical of \u003cstrong\u003econdensing boiler components\u003c\/strong\u003e. In the field, a compromised \u003cstrong\u003eblower assembly gasket\u003c\/strong\u003e can lead to air leaks that destabilize the fuel-to-air ratio, causing inefficient combustion or potential flame failure. Utilizing this direct-fit \u003cstrong\u003eWeil McLain 590-300-003 gasket\u003c\/strong\u003e ensures a reliable, airtight connection between the blower and the heat exchanger, preserving system static pressure and protecting sensitive \u003cstrong\u003eboiler replacement parts\u003c\/strong\u003e from heat degradation.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003eEnsures a \u003cstrong\u003egas-tight seal\u003c\/strong\u003e to optimize combustion efficiency and minimize energy loss.\u003c\/li\u003e\n  \u003cli\u003eSynthetic rubber construction offers superior resistance to \u003cstrong\u003eheat and chemical exposure\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003eDirect \u003cstrong\u003eOEM replacement\u003c\/strong\u003e for \u003cstrong\u003eWeil McLain Ultra Gas 550 and 750\u003c\/strong\u003e boiler models.\u003c\/li\u003e\n  \u003cli\u003eMaintains proper \u003cstrong\u003eairflow distribution\u003c\/strong\u003e within the blower assembly to prevent pressure drops.\u003c\/li\u003e\n  \u003cli\u003eCritical component for preventing dangerous CO leaks and ensuring \u003cstrong\u003eHVAC system safety\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions:\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should the Weil McLain 590-300-003 gasket be replaced?\u003c\/strong\u003e\u003cbr\u003e\nTechnicians should inspect the gasket during every annual boiler service. If you notice signs of compression set, cracking, or hardening, it must be replaced to prevent air leaks.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this gasket compatible with all Weil McLain Ultra models?\u003c\/strong\u003e\u003cbr\u003e\nWhile commonly used on larger \u003cstrong\u003eUltra Gas 550 and 750\u003c\/strong\u003e units, always verify the \u003cstrong\u003e590-300-003\u003c\/strong\u003e part number against your specific unit’s maintenance manual before installation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this part require any adhesive during installation?\u003c\/strong\u003e\u003cbr\u003e\nNo, this rubber gasket is designed for a precision dry-fit seal within the blower housing flange. Ensure both mating surfaces are clean and free of debris for a proper seat.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35643372236,"sku":"590-300-003","price":14.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_66dc5c81-f1b5-47b9-b06f-630aec9bfc35.png?v=1755718725"},{"product_id":"weil-mclain-590-317-610-gasket","title":"Weil McLain 590-317-610 Gasket","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 590-317-610 Gasket\u003c\/strong\u003e is a critical OEM replacement component designed to establish an airtight seal within the \u003cstrong\u003eblower assembly\u003c\/strong\u003e of Gold GV Series boilers. Engineered specifically for \u003cstrong\u003eHVAC blower flange\u003c\/strong\u003e applications, this high-temperature gasket prevents combustion gas bypass and air leakage, which can otherwise trigger pressure switch faults or lead to inefficient fuel-to-air ratios. As a veteran technician knows, maintaining the integrity of the \u003cstrong\u003eblower motor housing\u003c\/strong\u003e connection is essential for preventing nuisance outages and ensuring the \u003cstrong\u003eGV-3, GV-4, GV-5, and GV-6\u003c\/strong\u003e models operate within factory-specified static pressure parameters. This durable, exact-fit seal replaces worn or compressed \u003cstrong\u003eWeil McLain gaskets\u003c\/strong\u003e during routine maintenance or full blower assembly overhauls. Utilizing authentic \u003cstrong\u003eboiler repair parts\u003c\/strong\u003e like the 590-317-610 ensures compatibility with the existing flange geometry, mitigating the risk of carbon monoxide leakage and ensuring long-term system reliability in demanding residential and commercial heating environments.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003eEnsures a precise, airtight seal between the \u003cstrong\u003eblower flange\u003c\/strong\u003e and the housing to maintain optimal draft.\u003c\/li\u003e\n  \u003cli\u003eConstructed from high-grade, heat-resistant material to withstand the rigors of \u003cstrong\u003econdensing boiler\u003c\/strong\u003e operations.\u003c\/li\u003e\n  \u003cli\u003ePrevents common \u003cstrong\u003epressure switch\u003c\/strong\u003e errors caused by vacuum or pressure loss at the blower interface.\u003c\/li\u003e\n  \u003cli\u003eDirect-fit \u003cstrong\u003eOEM replacement\u003c\/strong\u003e for Weil McLain GV Series units, eliminating the need for generic modifications.\u003c\/li\u003e\n  \u003cli\u003eCritical for maintaining safe combustion and peak \u003cstrong\u003eHVAC system efficiency\u003c\/strong\u003e during high-fire cycles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eWhich boiler models are compatible with this gasket?\u003c\/strong\u003e\u003cbr\u003e\nThis part is specifically engineered for the \u003cstrong\u003eWeil McLain GV Series\u003c\/strong\u003e (Gold GV) boilers, including models GV-3 through GV-6. It is used to seal the blower motor assembly to the air intake\/combustion structure.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat are the signs that a blower flange gasket needs replacement?\u003c\/strong\u003e\u003cbr\u003e\nTechnicians should look for visible scorching or degradation around the blower flange, audible air whistles during the pre-purge cycle, or intermittent \"soft\" lockouts related to the \u003cstrong\u003eair pressure switch\u003c\/strong\u003e failing to close.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this a universal HVAC gasket?\u003c\/strong\u003e\u003cbr\u003e\nNo, the 590-317-610 is an \u003cstrong\u003eOEM-specific\u003c\/strong\u003e part with dimensions (approx. 5.45\" x 4.9\") tailored to the bolt pattern and port size of the GV Series blower. Using a non-genuine substitute can lead to improper seating and hazardous exhaust leaks.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong style=\"color: red;\"\u003eThis item is not eligible for free shipping.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35643399436,"sku":"590-317-610","price":15.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_f7efbf05-5846-4026-a0d5-c86b1bcbe622.jpg?v=1755718724"},{"product_id":"592-800-007","title":"Weil McLain 592-800-007 Polmer Seal","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 592-800-007\u003c\/strong\u003e is a precision-engineered \u003cstrong\u003e6-inch bottom elastomer seal\u003c\/strong\u003e designed to maintain the pressure vessel integrity of high-output cast iron boilers. This critical \u003cstrong\u003eHVAC replacement part\u003c\/strong\u003e is engineered specifically for sealing section joints in various Weil-McLain series, including the 86, 88, 94, and EG\/EGH models. Unlike standard gaskets, this \u003cstrong\u003eindustrial-grade elastomeric seal\u003c\/strong\u003e provides superior resistance to chemical degradation and thermal cycling, preventing leaks between heat exchanger sections that can lead to catastrophic system failure. For technicians performing an \u003cstrong\u003e88 series boiler repair\u003c\/strong\u003e or a \u003cstrong\u003esection block assembly\u003c\/strong\u003e, utilizing OEM-spec seals like the 592-800-007 ensures a flush, airtight fit that meets original factory tolerances. This \u003cstrong\u003eboiler section gasket\u003c\/strong\u003e is rated for high-temperature hydronic environments, providing the durability needed for demanding multi-section commercial and residential boiler installations.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003eSpecifically designed for \u003cstrong\u003eWeil-McLain boiler section joints\u003c\/strong\u003e to ensure a precise, leak-proof fit.\u003c\/li\u003e\n  \u003cli\u003eConstructed from \u003cstrong\u003ehigh-temp elastomer material\u003c\/strong\u003e capable of withstanding extreme thermal expansion and contraction.\u003c\/li\u003e\n  \u003cli\u003eCompatible with a wide range of models including \u003cstrong\u003eWeil-McLain 88, 94, LGB, and WTGO\u003c\/strong\u003e units.\u003c\/li\u003e\n  \u003cli\u003eCritical for maintaining system efficiency and preventing steam or water bypass in \u003cstrong\u003ecast iron heat exchangers\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003eResistant to chemicals and boiler treatment additives for long-term operational stability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eWhere is the 592-800-007 seal installed?\u003c\/strong\u003e\u003cbr\u003e\nThis seal is typically installed at the bottom of the section ports to establish a secure fluid connection between the cast iron sections of the boiler block.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this part compatible with non-Weil McLain units?\u003c\/strong\u003e\u003cbr\u003e\nNo, this is an OEM-configured \u003cstrong\u003eelastomer boiler seal\u003c\/strong\u003e designed specifically for the unique port geometry of Weil-McLain cast iron boilers. Using non-spec seals can lead to improper compression and subsequent leaks.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow many seals are required for a section replacement?\u003c\/strong\u003e\u003cbr\u003e\nThe number of seals depends on the number of sections being joined. Standard practice requires one \u003cstrong\u003e6-inch bottom seal\u003c\/strong\u003e per joint between sections.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong style=\"color: red;\"\u003eThis item is not eligible for free shipping.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35643575308,"sku":"592-800-007","price":16.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_1a89777d-88cd-494d-9656-ed8fc8475083.jpg?v=1755718723"},{"product_id":"weil-mclain-560-742-860-tubing","title":"Weil McLain 560-742-860 Pilot Tubing","description":"\u003cp\u003eThe \u003cstrong\u003eWeil-McLain 560-742-860 Pilot Tubing\u003c\/strong\u003e is a critical \u003cstrong\u003eOEM gas boiler part\u003c\/strong\u003e engineered for precise fuel delivery in standing pilot and electronic ignition systems. This \u003cstrong\u003e1\/8\" OD x 22 3\/4\" aluminum pilot tube\u003c\/strong\u003e features factory-installed \u003cstrong\u003ecompression fittings\u003c\/strong\u003e, ensuring a leak-resistant seal between the gas valve and the pilot burner assembly. Specifically designed for \u003cstrong\u003eWeil-McLain CGa, EG, PFG, and LGB Series 1 boilers\u003c\/strong\u003e, this component provides the mechanical integrity needed for stable flame performance and reliable system ignition. High-purity aluminum construction allows for optimal \u003cstrong\u003ethermal resistance\u003c\/strong\u003e and corrosion protection within the combustion chamber. For field technicians, the pre-formed design simplifies \u003cstrong\u003eboiler pilot line replacement\u003c\/strong\u003e, reducing labor time during annual maintenance or emergency service calls. It is essential to ensure proper routing away from high-heat surfaces to maintain consistent gas flow dynamics. This \u003cstrong\u003ereplacement pilot tubing\u003c\/strong\u003e is a standard-stock item for maintaining peak efficiency in residential and commercial hydronic heating applications.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits for Technicians:\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision Fitment:\u003c\/strong\u003e Pre-cut to 22-3\/4 inches with 1\/8-inch outer diameter for direct compatibility with \u003cstrong\u003eWeil-McLain boiler models\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComplete Assembly:\u003c\/strong\u003e Includes \u003cstrong\u003efactory-installed compression fittings\u003c\/strong\u003e, eliminating the need for on-site flaring or specialized tools.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Durability Material:\u003c\/strong\u003e Constructed from \u003cstrong\u003ecorrosion-resistant aluminum\u003c\/strong\u003e to withstand the rigors of standard combustion environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Standards:\u003c\/strong\u003e Guaranteed \u003cstrong\u003egenuine Weil-McLain part\u003c\/strong\u003e performance for maintaining equipment safety certifications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions:\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eIs this tubing compatible with both Natural Gas and Propane units?\u003c\/strong\u003e\u003cbr\u003e\nYes, this tubing is suitable for both gas types, provided it is used within the pressure and temperature ratings of the \u003cstrong\u003eWeil-McLain gas-fired boiler\u003c\/strong\u003e series specified.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this part replace the pilot line for both standing pilot and spark ignition?\u003c\/strong\u003e\u003cbr\u003e\nThis specific assembly is utilized across several \u003cstrong\u003eSeries 1 gas boilers\u003c\/strong\u003e that require an 1\/8\" OD feed line, though technicians should verify the specific length requirement for their ignition configuration.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I cut or bend this tubing to fit other models?\u003c\/strong\u003e\u003cbr\u003e\nWhile the \u003cstrong\u003ealuminum pilot tubing\u003c\/strong\u003e is malleable, it is precision-formed for specific Weil-McLain models. Significant modifications or sharp kinks can restrict gas flow and compromise safety.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35643705740,"sku":"560-742-860","price":17.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Pic_7d4f4aee-ef6f-4c60-be45-3142fdc4c329.png?v=1755718722"},{"product_id":"weil-mclain-592-800-005-seal","title":"Weil McLain 592-800-005 Seal","description":"\u003cp\u003eThe \u003cstrong\u003eWeil-McLain 592-800-005\u003c\/strong\u003e is a \u003cstrong\u003e9-inch polymer seal\u003c\/strong\u003e specifically engineered for high-temperature applications within \u003cstrong\u003ecast iron boiler sections\u003c\/strong\u003e. This \u003cstrong\u003eOEM replacement part\u003c\/strong\u003e is critical for maintaining a pressure-tight hydraulic seal between the upper sections of compatible \u003cstrong\u003eWeil-McLain commercial boilers\u003c\/strong\u003e. Designed to withstand constant thermal cycling and chemical exposure, this \u003cstrong\u003epolymer port seal\u003c\/strong\u003e ensures the integrity of the heat exchanger and prevents leaks that can lead to system pressure drops or scale buildup. When performing a section block repair or teardown, using a \u003cstrong\u003egenuine Weil-McLain seal\u003c\/strong\u003e is necessary to ensure precise tolerances and long-term reliability. This \u003cstrong\u003esealing gasket\u003c\/strong\u003e is fabricated from high-grade elastomers that resist compression set, making it the standard choice for contractors focused on restorative maintenance and \u003cstrong\u003ehydronic heating system\u003c\/strong\u003e efficiency. Proper alignment during installation is mandatory to prevent premature failure of the \u003cstrong\u003eboiler section seal\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits for Technicians\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrecision Fit:\u003c\/strong\u003e 9-inch diameter ensures a perfect seat on the upper port of \u003cstrong\u003eWeil-McLain cast iron sections\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHigh Thermal Stability:\u003c\/strong\u003e Engineered for \u003cstrong\u003ehigh-temp boiler environments\u003c\/strong\u003e without losing elasticity or sealing properties.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eChemical Resistance:\u003c\/strong\u003e Designed to resist degradation from common hydronic system additives and glycol mixtures.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOEM Integrity:\u003c\/strong\u003e Maintains the original manufacturer's specifications for system safety and pressure ratings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Questions from the Field\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I ensure a proper seal when installing the 592-800-005?\u003c\/strong\u003e\u003cbr\u003e\nEnsure all mating surfaces on the cast iron sections are thoroughly cleaned of old residue or oxidation. Apply the recommended lubricant to the \u003cstrong\u003epolymer seal\u003c\/strong\u003e to prevent binding or pinching during section pull-up.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan this 9-inch polymer seal be used on lower boiler ports?\u003c\/strong\u003e\u003cbr\u003e\nNo, this specific part number is designed for the 9-inch top ports. Lower ports typically require different diameters; always verify the \u003cstrong\u003eboiler parts list\u003c\/strong\u003e for the specific series you are servicing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat are the signs that a section seal has failed?\u003c\/strong\u003e\u003cbr\u003e\nLook for localized corrosion at the section joints, white mineral deposits (leaking water evaporating), or a loss of system pressure that cannot be attributed to the expansion tank or air vents.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35643880652,"sku":"592-800-005","price":20.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_8ec0466a-d0b3-4d98-892c-acac17970f26.jpg?v=1755718722"},{"product_id":"weil-mclain-511-210-423-drain-valve","title":"Weil McLain 511-210-423 Drain Valve","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 511-210-423 Drain Valve\u003c\/strong\u003e is a heavy-duty \u003cstrong\u003ebrass boiler drain valve\u003c\/strong\u003e engineered specifically for hydronic heating systems. Featuring a rugged \u003cstrong\u003e3\/4\" NPT\u003c\/strong\u003e connection and a \u003cstrong\u003e1 1\/2\" shank\u003c\/strong\u003e, this component ensures a secure, leak-proof interface with the boiler block or distribution manifold. As an authentic \u003cstrong\u003eWeil McLain replacement part\u003c\/strong\u003e, it is designed to meet exact OEM tolerances, providing contractors with a reliable solution for system flushing and sediment removal during routine maintenance. The high-quality brass construction is selected for its superior corrosion resistance and thermal stability in high-temperature heating applications. In the field, this \u003cstrong\u003eNPT drain valve\u003c\/strong\u003e proves essential for professional \u003cstrong\u003ehydronic system maintenance\u003c\/strong\u003e, allowing for efficient drainage without the risk of thread galling or premature seal failure. Whether you are servicing a residential CGa series or a commercial-grade unit, ensuring you have the correct \u003cstrong\u003eHVAC drain valve\u003c\/strong\u003e is critical for long-term operational efficiency and minimizing callbacks.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Compatibility:\u003c\/strong\u003e Precision-fit for Weil McLain boiler systems to ensure seamless integration and eliminate sizing errors.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorrosion-Resistant Brass:\u003c\/strong\u003e Constructed from high-stability brass to withstand constant exposure to system water and high temperatures.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSecure Sealing:\u003c\/strong\u003e Standard \u003cstrong\u003e3\/4 inch NPT\u003c\/strong\u003e threading provides a tight, high-pressure seal against the boiler trim.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEfficient Serviceability:\u003c\/strong\u003e The \u003cstrong\u003e1 1\/2 inch shank\u003c\/strong\u003e length provides sufficient clearance for easy tool access and hose attachment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eIs this valve compatible with other boiler brands?\u003c\/strong\u003e\u003cbr\u003e\nWhile the \u003cstrong\u003e3\/4\" NPT\u003c\/strong\u003e threading is a standard size, this specific part number is optimized for Weil McLain configurations to match their boiler trim and shank requirements.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan this be used on both steam and hot water boilers?\u003c\/strong\u003e\u003cbr\u003e\nYes, this brass valve is designed to handle the thermal demands of both steam and hydronic water heating environments.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the purpose of the 1 1\/2\" shank?\u003c\/strong\u003e\u003cbr\u003e\nThe extended shank provides the necessary reach to exit the boiler jacket or insulation, allowing for a standard garden hose connection for easy system draining.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35643942348,"sku":"511-210-423","price":35.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_cac1efa8-40e7-4373-ae2f-ceaea0b5f0ae.jpg?v=1755718721"},{"product_id":"weil-mclain-560-528-998-orifice","title":"Weil McLain 560-528-998 Orifice","description":"\u003cp\u003eFor service technicians maintaining Weil-McLain hydronic systems, the \u003cstrong\u003eWeil-McLain 560-528-998 LP Gas Orifice\u003c\/strong\u003e is a critical component for ensuring precise stoichiometric combustion in propane-fired applications. This \u003cstrong\u003eOEM LP gas orifice\u003c\/strong\u003e is engineered with a high-tolerance \u003cstrong\u003e1.3mm drill size\u003c\/strong\u003e, providing the exact fuel-to-air ratio required for consistent \u003cstrong\u003eboiler gas burner\u003c\/strong\u003e performance. Designed for durability in high-demand environments, it features a standard \u003cstrong\u003e7\/16-inch hex\u003c\/strong\u003e head for reliable torque during installation and \u003cstrong\u003e1\/8-inch NPT\u003c\/strong\u003e threading to ensure a leak-free manifold connection. This specific orifice is frequently utilized in \u003cstrong\u003eWeil-McLain CGa\u003c\/strong\u003e and CG boiler series, where maintaining the correct manifold pressure and flow rate is non-negotiable for system efficiency. As a veteran contractor knows, using precision-drilled \u003cstrong\u003eboiler replacement parts\u003c\/strong\u003e instead of generic alternatives prevents common issues like back-burning, soot accumulation, and irregular flame patterns. When converting or servicing propane units, this component is essential for achieving the thermal output specified on the appliance rating plate without compromising the combustion profile.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision Metering:\u003c\/strong\u003e The \u003cstrong\u003e1.3mm drill\u003c\/strong\u003e configuration ensures a calibrated flow rate for optimal \u003cstrong\u003epropane gas combustion\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Compatibility:\u003c\/strong\u003e Specifically designed for direct fitment in \u003cstrong\u003eWeil-McLain CGa\u003c\/strong\u003e and CG series gas-fired boilers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e High-quality brass material withstands the thermal stresses of continuous \u003cstrong\u003eHVAC burner\u003c\/strong\u003e operation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandardized Fit:\u003c\/strong\u003e \u003cstrong\u003e1\/8-inch NPT\u003c\/strong\u003e threads and \u003cstrong\u003e7\/16-inch hex\u003c\/strong\u003e sizing allow for straightforward replacement with standard technician tools.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eIs this orifice compatible with natural gas systems?\u003c\/strong\u003e\u003cbr\u003e\nNo, this part is specifically sized for \u003cstrong\u003eLP (Propane)\u003c\/strong\u003e. Natural gas requires a larger orifice (typically 2.0mm for this series) due to its lower BTU content per cubic foot.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I drill out an old orifice to match this 1.3mm specification?\u003c\/strong\u003e\u003cbr\u003e\nWhile field-modifying orifices is technically possible, using a factory-drilled \u003cstrong\u003eWeil-McLain 560-528-998\u003c\/strong\u003e is the professional standard to ensure the precision required for modern, high-efficiency burners.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat symptoms indicate a clogged or incorrect gas orifice?\u003c\/strong\u003e\u003cbr\u003e\nCommon signs include uneven flame heights, yellow tipping (incomplete combustion), or the boiler failing to reach full thermal capacity due to restricted fuel flow.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35643985932,"sku":"560-528-998","price":16.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/Pic_a0d14fb1-cf94-4d34-940d-8ddffde4152e.png?v=1755718720"},{"product_id":"weil-mclain-510-300-013-spill-switch","title":"Weil McLain 510-300-013 Spill Switch","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 510-300-013 Spill Switch\u003c\/strong\u003e is a critical safety component designed specifically for certain \u003cstrong\u003eWeil McLain gas-fired boilers\u003c\/strong\u003e, including the \u003cstrong\u003eCG, CGA, EG, and PFG\u003c\/strong\u003e series. This premium safety limit is engineered to detect flue gas spillage caused by chimney blockages or improper venting. The unit features an \u003cstrong\u003eintegrated manual reset (M\/R)\u003c\/strong\u003e button, ensuring that your heating system cannot resume operation until a qualified technician investigates and resolves the underlying venting problem. Unlike automatic switches, this \u003cstrong\u003emanual reset spill switch\u003c\/strong\u003e prevents the boiler from cycling under dangerous conditions, effectively mitigating the risk of carbon monoxide infiltration.\u003c\/p\u003e\n\n\u003cp\u003eOperating with a precise \u003cstrong\u003e210°F temperature rating\u003c\/strong\u003e, this switch acts as a failsafe when high-temperature flue gases exceed the safe limit at the draft hood. It is an authentic \u003cstrong\u003eWeil McLain OEM replacement part\u003c\/strong\u003e, ensuring standardized fitment and compliance with the original equipment design for the \u003cstrong\u003eCG-25\u003c\/strong\u003e and larger residential boiler configurations. As a \u003cstrong\u003enormally closed safety circuit\u003c\/strong\u003e component, it maintains constant continuity under standard operating conditions and opens the circuit instantly upon reaching its specialized thermal trip point. Durable construction and a \u003cstrong\u003efactory-calibrated sensor\u003c\/strong\u003e provide the reliability required for multi-season performance in high-demand hydronic systems.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSafety Interlock:\u003c\/strong\u003e High-accuracy \u003cstrong\u003e210 degree Fahrenheit\u003c\/strong\u003e trip point ensures rapid system shutdown during flue gas spillage events.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eManual Reset Feature:\u003c\/strong\u003e Prevents automatic restart to ensure the venting obstruction or backdraft issue is addressed by a professional.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBroad Compatibility:\u003c\/strong\u003e Genuine replacement for \u003cstrong\u003eWeil McLain CG, CGA, and EG boilers\u003c\/strong\u003e, including sizes 30 through 55.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOEM Reliability:\u003c\/strong\u003e Direct manufacturer replacement (\u003cstrong\u003ePart Number 510-300-013\u003c\/strong\u003e) designed specifically for spark ignition gas boilers.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEasy Mounting:\u003c\/strong\u003e Pre-drilled for standard draft hood installation, simplifying field service and replacement for contractors.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat causes a spill switch to trip on a Weil McLain boiler?\u003c\/strong\u003e\u003cbr\u003e\nTripping is typically caused by a restricted chimney, a birds nest in the vent, snow covering the flue outlet, or a lack of adequate combustion air in the mechanical room.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs the 510-300-013 interchangeable with other spill switches?\u003c\/strong\u003e\u003cbr\u003e\nWhile physical dimensions may match, you must use the specific \u003cstrong\u003e210F rated switch\u003c\/strong\u003e designated for your model. Using a higher or lower temperature rating can result in nuisance trips or dangerous delayed shutdowns.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow do I test if the spill switch is defective?\u003c\/strong\u003e\u003cbr\u003e\nA veteran technician should use a multi-meter to check for continuity across the terminals. If the switch is open at room temperature and refuses to reset via the manual button, it needs replacement.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35644011916,"sku":"510-300-013","price":23.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Pic_04248186-d3d8-4da3-af97-d772b378956d.png?v=1755718720"},{"product_id":"weil-mclain-512-200-035-aluminized-burner","title":"Weil McLain 512-200-035 Aluminized Burner","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 512-200-035 aluminized burner\u003c\/strong\u003e is a professional-grade replacement component engineered specifically for high-efficiency hydronic systems, including the \u003cstrong\u003eHE, HE II, and VHE boiler series\u003c\/strong\u003e. Featuring a \u003cstrong\u003e1-inch OD and 15-inch length\u003c\/strong\u003e, this specialized \u003cstrong\u003egas burner tube\u003c\/strong\u003e is constructed from aluminized steel to prevent the \u003cstrong\u003eburner carry-over problems\u003c\/strong\u003e often associated with incorrect stainless steel substitutions. As an \u003cstrong\u003eOEM Weil McLain replacement part\u003c\/strong\u003e, it ensures precise flame pattern distribution and reliable ignition cycles within the combustion chamber. This component replaces the discontinued \u003cstrong\u003eWeil McLain 512-200-075 burner\u003c\/strong\u003e, maintaining the tight tolerances required for atmospheric or induced draft venting. For contractors performing \u003cstrong\u003eboiler maintenance\u003c\/strong\u003e or emergency repairs, using the manufacturer-specified \u003cstrong\u003ealuminized burner tube\u003c\/strong\u003e is essential to maintain proper combustion analysis readings and prevent premature heat exchanger fouling. This burner is designed for durability in \u003cstrong\u003econdensing and non-condensing Weil McLain boilers\u003c\/strong\u003e, providing a direct fit without the need for field modifications.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExact Compatibility:\u003c\/strong\u003e Direct replacement for \u003cstrong\u003eWeil McLain HE, HE II, and VHE series boilers\u003c\/strong\u003e, ensuring no-gap fitment.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Integrity:\u003c\/strong\u003e \u003cstrong\u003eAluminized steel construction\u003c\/strong\u003e prevents carbon buildup and maintains thermal stability under high-stress operation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePerformance Security:\u003c\/strong\u003e Corrects \u003cstrong\u003eignition crossover issues\u003c\/strong\u003e by providing the exact venturi and port geometry required for OEM specifications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem Longevity:\u003c\/strong\u003e Helps maintain factory-rated efficiency and reduces the risk of soot accumulation on the heat exchanger fins.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use a stainless steel burner instead of this aluminized version?\u003c\/strong\u003e\u003cbr\u003e\nNo. Weil McLain specifically requires \u003cstrong\u003ealuminized steel burners\u003c\/strong\u003e for these models to prevent carry-over problems. Using a different material can lead to improper combustion and potential safety hazards.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill this burner fit the Weil McLain HE-3 series?\u003c\/strong\u003e\u003cbr\u003e\nThis specific part is listed for HE, HE II, and VHE boilers. Always verify your specific \u003cstrong\u003eboiler model and series number\u003c\/strong\u003e against the manufacturer’s parts list before installation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this include the mounting bracket?\u003c\/strong\u003e\u003cbr\u003e\nThis is the \u003cstrong\u003eburner tube only\u003c\/strong\u003e (1\" OD x 15\" L). If your existing \u003cstrong\u003eburner bracket\u003c\/strong\u003e is corroded or damaged, it must be sourced separately or reused if in good condition.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong style=\"color: red;\"\u003eThis item is not eligible for free shipping.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35644163276,"sku":"512-200-035","price":27.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Pic_b35346cb-7698-489c-bcfd-4ac286f00a88.png?v=1755718719"},{"product_id":"weil-mclain-512-050-230-thermo-fuse","title":"Weil McLain 512-050-230 Thermo-fuse","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 512-050-230 Thermo-fuse\u003c\/strong\u003e is a critical safety component designed for \u003cstrong\u003eflame rollout protection\u003c\/strong\u003e in high-efficiency gas boilers. For technicians servicing residential or light commercial systems, this \u003cstrong\u003ethermal fuse element\u003c\/strong\u003e is the last line of defense against hazardous combustion conditions. Rated for a precise opening temperature of \u003cstrong\u003e228°C (442°F)\u003c\/strong\u003e, the device is engineered to interrupt the electrical circuit to the gas valve or control module immediately upon detecting excessive heat near the burner assembly. This one-time \u003cstrong\u003eOEM replacement part\u003c\/strong\u003e is essential for maintaining the safety integrity of \u003cstrong\u003eWeil McLain CGi, CGa, EG, and PFG series boilers\u003c\/strong\u003e. When a rollout event occurs, this fuse \"blows\" to prevent damage to the wiring harness and surrounding cabinet components. Professional diagnostics should always include a thorough inspection of the heat exchanger and venting system if this \u003cstrong\u003eboiler safety switch\u003c\/strong\u003e triggers, as it typically indicates a blocked flue or significant soot accumulation.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecise Thermal Response:\u003c\/strong\u003e Factory-calibrated to trip at 228°C (442°F) for reliable over-temperature protection.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Compatibility:\u003c\/strong\u003e Direct fit for multiple Weil McLain gas-fired water and steam boiler series including CG, HE, and VHE.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnhanced Safety:\u003c\/strong\u003e Effectively mitigates risks associated with flame rollout and blocked vent conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContractor-Grade Durability:\u003c\/strong\u003e Constructed with heat-rated insulated leads to withstand the rigorous environment of the combustion chamber.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStreamlined Installation:\u003c\/strong\u003e Designed as a drop-in replacement for existing rollout switch assemblies to minimize downtime.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eIs the 512-050-230 thermo-fuse resettable?\u003c\/strong\u003e\u003cbr\u003e\nNo, this is a one-time thermal link. Once it has been exposed to temperatures exceeding its 442°F rating, the internal element melts to break the circuit and the entire part must be replaced.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat causes this rollout fuse to trip?\u003c\/strong\u003e\u003cbr\u003e\nThe fuse usually opens due to flames \"rolling out\" of the combustion chamber. This is commonly caused by a cracked heat exchanger, a blocked chimney\/vent, or heavily sooted boiler sections forcing gases out the burner front.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I jumper this switch to test the boiler?\u003c\/strong\u003e\u003cbr\u003e\nBypassing safety controls is never recommended. While a multimeter can confirm the fuse is open, the root cause of the rollout must be identified and repaired before a new fuse is installed and the system is fired.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong style=\"color: red;\"\u003eThis item is not eligible for free shipping.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35644277900,"sku":"512-050-230","price":37.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/Pic_76acc740-eb95-4da5-bc44-1e853cf52c85.jpg?v=1755718718"},{"product_id":"weil-mclain-512-200-077-main-burner","title":"Weil McLain 512-200-077 Main Burner","description":"\u003cp\u003eThe \u003cstrong\u003eWeil-McLain 512-200-077 Main Burner\u003c\/strong\u003e is a critical combustion component engineered for high-performance gas delivery and flame stability in hydronic heating systems. As a veteran-grade \u003cstrong\u003eWeil-McLain burner replacement\u003c\/strong\u003e, this tubular stainless steel unit is designed specifically for \u003cstrong\u003eboiler maintenance\u003c\/strong\u003e in AHE, CG, and CGa series models. Its high-grade \u003cstrong\u003estainless steel burner tube\u003c\/strong\u003e construction resists the corrosive effects of localized high-temperature combustion and condensation, ensuring long-term structural integrity and consistent thermal output. For service technicians, this \u003cstrong\u003eOEM boiler part\u003c\/strong\u003e ensures an exact fit, maintaining the precise venturi alignment required for optimal air-to-fuel ratios and preventing soot accumulation or irregular flame patterns. Integrating this \u003cstrong\u003egas boiler burner\u003c\/strong\u003e during routine service calls late in the season helps restore factory-spec combustion efficiency and system reliability. Each unit is manufactured to handle the rigorous duty cycles of residential and light commercial cast-iron boilers, facilitating a uniform burner flame across the entire heat exchanger surface for maximum heat transfer.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect OEM Match:\u003c\/strong\u003e Designed for seamless integration into Weil-McLain AHE, CG, and CGa series boiler burner manifolds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorrosion Resistance:\u003c\/strong\u003e High-grade stainless steel construction prevents premature oxidation and orifice clogging.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCombustion Precision:\u003c\/strong\u003e Engineered as a regular burner to provide stable flame characteristics and low-noise operation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReliable Ignition:\u003c\/strong\u003e Features a consistent port design to support fast light-offs and smooth crossovers across the burner tray.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs this burner compatible with all CG series boilers?\u003c\/strong\u003e\u003cbr\u003e\nThe 512-200-077 is designed for AHE, CG, and CGa series units. It is classed as a 'regular' burner; for models requiring a pilot bracket or specific ignition mounts, you should verify if part numbers 512-200-078 or 512-200-079 are required for your specific manifold configuration.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill this burner work for Propane (LP) conversions?\u003c\/strong\u003e\u003cbr\u003e\nWhile the burner tube is physically compatible with both natural gas and liquid propane, the specific orifice size and manifold pressure settings must be adjusted according to the manufacturer's conversion specifications for the boiler model in question.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow many burners are required for a complete manifold replacement?\u003c\/strong\u003e\u003cbr\u003e\nThis varies by the boiler's BTU rating. For example, an AHE-45 typically utilizes three burners, while an AHE-60 requires four. Always consult the specific boiler's Rating Plate or Service Manual to determine the correct quantity for the full assembly.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35644339724,"sku":"512-200-077","price":28.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_ea99504d-3dbf-4dd5-a1c1-ab3bbeaff2d5.jpg?v=1755718717"},{"product_id":"weil-mclain-560-742-865-tubing","title":"Weil McLain 560-742-865 Tubing","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 560-742-865 Pilot Tubing\u003c\/strong\u003e is a critical \u003cstrong\u003eOEM replacement part\u003c\/strong\u003e designed for precision fuel delivery in \u003cstrong\u003eWeil McLain EGH series boilers\u003c\/strong\u003e. Measuring \u003cstrong\u003e34 inches in length\u003c\/strong\u003e with a \u003cstrong\u003e1\/8\" OD (Outer Diameter)\u003c\/strong\u003e, this aluminum tubing is engineered to withstand the thermal stresses of the burner vestibule while maintaining a consistent gas feed to the pilot burner assembly. Whether you are servicing a \u003cstrong\u003estanding pilot\u003c\/strong\u003e system or a \u003cstrong\u003espark-to-light\u003c\/strong\u003e configuration, this tubing provides the necessary reach and flexibility for proper routing around the heat exchanger and gas valve components. The inclusion of factory-spec \u003cstrong\u003ecompression fittings\u003c\/strong\u003e ensures a gas-tight seal, preventing the common pressure drops or leaks associated with mismatched aftermarket alternatives. For contractors, using this \u003cstrong\u003egenuine Weil McLain part\u003c\/strong\u003e is essential for maintaining the manifold pressure and flame rectification integrity required for high-efficiency boiler operation. This \u003cstrong\u003eboiler pilot line\u003c\/strong\u003e is built for durability, resisting corrosion and vibration fatigue in demanding commercial and residential hydronic heating environments.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecise Fitment:\u003c\/strong\u003e Sized at \u003cstrong\u003e1\/8\" OD x 34\"\u003c\/strong\u003e to match original factory specifications for \u003cstrong\u003eEGH boilers\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e High-grade aluminum provides excellent corrosion resistance and thermal stability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSecure Connections:\u003c\/strong\u003e Pre-installed \u003cstrong\u003ecompression fittings\u003c\/strong\u003e eliminate the need for manual flaring or specialized tools.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Integrity:\u003c\/strong\u003e Ensures 100% compatibility with \u003cstrong\u003eWeil McLain gas valves\u003c\/strong\u003e and pilot burners.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions:\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIs this tubing compatible with LP or Natural Gas?\u003c\/strong\u003e Yes, the 560-742-865 is designed to handle both fuel types, provided the correct pilot orifice is installed at the burner.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCan this tubing be cut to a shorter length?\u003c\/strong\u003e While it is 34 inches long, it can be trimmed if necessary, but maintaining the factory seal with the included fittings is recommended for optimal performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWhich boiler models use this pilot tubing?\u003c\/strong\u003e It is specifically listed for \u003cstrong\u003eWeil McLain EGH series\u003c\/strong\u003e gas-fired boilers, often used in both steam and water applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35644344780,"sku":"560-742-865","price":28.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_871e3835-7713-4b78-b3c9-5f89acd91ff0.png?v=1755718717"},{"product_id":"weil-mclain-511-724-254-thermocouple","title":"Weil McLain 511-724-254 Thermocouple","description":"\u003cp\u003eWhen you're dealing with a standing pilot that won't hold, the \u003cstrong\u003eWeil McLain 511-724-254 30-inch Thermocouple\u003c\/strong\u003e is the specified OEM solution for restoring millivolt signal reliability. This is a \u003cstrong\u003escrew-in thermocouple\u003c\/strong\u003e designed specifically for \u003cstrong\u003enatural gas boilers\u003c\/strong\u003e, featuring the heavy-duty construction required for high-cycle commercial and residential environments. At a \u003cstrong\u003e30-inch lead length\u003c\/strong\u003e, it provides ample slack for proper routing away from high-heat zones, ensuring the copper capillary remains protected. Unlike universal alternatives that often require sloppy adapters, this \u003cstrong\u003eWeil McLain OEM part\u003c\/strong\u003e threads directly into the pilot bracket for a precise, gas-tight fit.\u003c\/p\u003e\n\n\u003cp\u003eThis \u003cstrong\u003epilot safety sensor\u003c\/strong\u003e is engineered to generate the necessary voltage to hold the \u003cstrong\u003egas valve solenoid\u003c\/strong\u003e open under standard operating temperatures. It is the primary replacement for \u003cstrong\u003eWeil McLain CG, CGa, EG, and EGH series boilers\u003c\/strong\u003e. As a veteran tech, you know that using a 30\" \u003cstrong\u003eexact-fit thermocouple\u003c\/strong\u003e prevents common nuisance lockouts caused by weak millivolt drop-off. If you’re seeing a pilot flame that hits the tip but won't stay lit after releasing the knob, swapping in this \u003cstrong\u003enatural gas thermocouple\u003c\/strong\u003e is the standard protocol for \u003cstrong\u003eboiler troubleshooting\u003c\/strong\u003e and maintenance.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits for the Contractor\u003c\/strong\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eExact OEM Match:\u003c\/strong\u003e Designed specifically for \u003cstrong\u003eWeil McLain boilers\u003c\/strong\u003e, ensuring the tip sits perfectly in the pilot flame for optimal heat-to-millivolt conversion.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e30-Inch Length:\u003c\/strong\u003e Offers flexible routing for \u003cstrong\u003eCGa, EG, and EGH models\u003c\/strong\u003e, keeping the lead clear of burner interference.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eScrew-In Design:\u003c\/strong\u003e Provides a rigid, secure connection to the pilot assembly that won't vibrate loose during high-efficiency firing cycles.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNatural Gas Optimized:\u003c\/strong\u003e Calibrated for the specific thermal properties of \u003cstrong\u003enatural gas standing pilot\u003c\/strong\u003e systems.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eReliable Safety Termination:\u003c\/strong\u003e Ensures fast gas shut-off if the pilot flame is extinguished, meeting strict \u003cstrong\u003eHVAC safety standards\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions \u0026amp; Troubleshooting\u003c\/strong\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWill this work with LP (Propane) systems?\u003c\/strong\u003e This specific part is listed for \u003cstrong\u003enatural gas applications\u003c\/strong\u003e. Always verify the orifice and thermocouple specs in the service manual for LP conversions to ensure proper millivolt output.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWhy is my pilot still dropping out with a new thermocouple?\u003c\/strong\u003e Check for \u003cstrong\u003emillivolt drop\u003c\/strong\u003e at the gas valve connection. Ensure the connection is \"finger tight plus a quarter-turn\"—over-tightening can crush the internal lead and cause high resistance.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIs this compatible with newer electronic ignition models?\u003c\/strong\u003e No, this is for \u003cstrong\u003estanding pilot boilers\u003c\/strong\u003e. Units with intermittent pilot ignition (IPI) typically use a flame sensor or a different pilot-proving assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong style=\"color: red;\"\u003eThis item is not eligible for free shipping.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35644398732,"sku":"511-724-254","price":37.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_b6a0c66a-f713-452c-8870-4d810b77af73.jpg?v=1755718716"},{"product_id":"weil-mclain-383-500-604-fuses","title":"Weil McLain 383-500-604 Fuses","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 383-500-604\u003c\/strong\u003e is a critical \u003cstrong\u003e12A slow blow fuse\u003c\/strong\u003e designed specifically for the protection of advanced control modules in \u003cstrong\u003econdensing gas boilers\u003c\/strong\u003e. For service technicians troubleshooting a blank display or a non-responsive \u003cstrong\u003eUltra U-Control module\u003c\/strong\u003e, these high-amperage \u003cstrong\u003eglass fuses\u003c\/strong\u003e are the standard requirement to safeguard line voltage circuits against transient surges without premature tripping. Unlike standard fast-acting alternatives, the slow-blow characteristic of this \u003cstrong\u003eOEM boiler part\u003c\/strong\u003e allows for the brief inrush currents typical of blowers and circulators, ensuring operational stability in demanding hydronic applications.\u003c\/p\u003e\n\n\u003cp\u003eThis 5-pack of \u003cstrong\u003ereplacement boiler fuses\u003c\/strong\u003e is engineered for a precise fit within the \u003cstrong\u003eWeil McLain Ultra\u003c\/strong\u003e, \u003cstrong\u003eSlimFit\u003c\/strong\u003e, and \u003cstrong\u003eEvergreen\u003c\/strong\u003e series boards. Maintaining a stock of these \u003cstrong\u003eWeil McLain 383-500-604 fuses\u003c\/strong\u003e on the service truck is essential for rapid \u003cstrong\u003eboiler repair\u003c\/strong\u003e, as these specific 12-amp components are frequently the primary point of failure when protecting the \u003cstrong\u003eU-Control module\u003c\/strong\u003e from external electrical faults. Professionals should verify the amperage rating on the board’s \u003cstrong\u003efuse holder\u003c\/strong\u003e before installation to ensure system integrity and prevent control module damage.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits for Technicians\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOptimized Surge Tolerance:\u003c\/strong\u003e Engineered as a slow-blow component to handle startup loads of system components without nuisance tripping.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDirect Circuit Protection:\u003c\/strong\u003e Specifically rated at 12A and 250V to match the exact specifications of the \u003cstrong\u003eUltra series control board\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBroad Compatibility:\u003c\/strong\u003e Supports a wide range of high-efficiency units, including the \u003cstrong\u003eWeil McLain SlimFit\u003c\/strong\u003e, \u003cstrong\u003eECO\u003c\/strong\u003e, and \u003cstrong\u003eWM97+\u003c\/strong\u003e models.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOEM Reliability:\u003c\/strong\u003e Ensures the \u003cstrong\u003eline voltage circuit\u003c\/strong\u003e operates within factory parameters to protect sensitive electronics.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy would my Weil McLain boiler have a blank display while the inducer is still running?\u003c\/strong\u003e\u003cbr\u003e\nThis often indicates a blown fuse on the control board. If the 3-amp low-voltage fuse is intact, the \u003cstrong\u003e12A slow blow fuse\u003c\/strong\u003e (F2\/F3 depending on the model) should be inspected as it handles the line voltage power to the \u003cstrong\u003eU-Control module\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use a standard 12A fast-acting fuse instead of the 383-500-604?\u003c\/strong\u003e\u003cbr\u003e\nNo. Using a fast-acting fuse in place of a \u003cstrong\u003eslow-blow fuse\u003c\/strong\u003e will lead to frequent failures because it cannot withstand the initial inrush current of the boiler’s internal components.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhich Weil McLain models use these 12-amp fuses?\u003c\/strong\u003e\u003cbr\u003e\nThese are standard for the \u003cstrong\u003eUltra\u003c\/strong\u003e (Commercial and Residential), \u003cstrong\u003eEvergreen\u003c\/strong\u003e, \u003cstrong\u003eSlimFit\u003c\/strong\u003e, and \u003cstrong\u003eECO\u003c\/strong\u003e gas boilers. Check your specific manual to confirm if your board requires the \u003cstrong\u003e312.125P\u003c\/strong\u003e equivalent or the \u003cstrong\u003e383-500-604\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35644400204,"sku":"383-500-604","price":40.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Pic_7adc4d9d-f4a8-4059-869f-47ee47666708.png?v=1755718715"},{"product_id":"weil-mclain-590-317-579-gasket","title":"Weil McLain 590-317-579 Gasket","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 590-317-579 Gasket\u003c\/strong\u003e is a critical \u003cstrong\u003eOEM replacement part\u003c\/strong\u003e designed for sealing the \u003cstrong\u003erectangular heater cover plate\u003c\/strong\u003e in high-efficiency hydronic systems. This high-temperature \u003cstrong\u003erectangular gasket\u003c\/strong\u003e is engineered to withstand the rigorous thermal cycling and pressure fluctuations common in commercial and residential boiler operations. Measuring approximately 5-1\/4\" x 10\", it ensures a secure, leak-proof interface between the cover plate and the heat exchanger or boiler section, maintaining system integrity and preventing steam or water bypass. As an essential component for routine service and heat exchanger maintenance, this \u003cstrong\u003eboiler cover plate gasket\u003c\/strong\u003e is built from durable, industrial-grade materials to prevent premature failure. For technicians performing \u003cstrong\u003ehydronic heating repairs\u003c\/strong\u003e, using genuine \u003cstrong\u003eWeil McLain boiler parts\u003c\/strong\u003e ensures precise alignment and compatibility with specific cast iron sections, avoiding the mechanical issues often associated with generic alternatives.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003eEnsures a high-pressure, leak-proof seal for the \u003cstrong\u003etankless heater cover plate\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003eCompatible with \u003cstrong\u003eWeil McLain 66, 68, 76, 88, EG, EGH, and SGO\u003c\/strong\u003e series boilers.\u003c\/li\u003e\n  \u003cli\u003eManufactured from durable \u003cstrong\u003ehigh-temperature gasket material\u003c\/strong\u003e to resist degradation in extreme operating conditions.\u003c\/li\u003e\n  \u003cli\u003ePrecision-cut rectangular profile facilitates rapid \u003cstrong\u003efield installation and maintenance\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003ePrevents system pressure loss by maintaining a tight seal on \u003cstrong\u003eheater opening sections\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions:\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHow do I confirm the 590-317-579 is the correct fit for my boiler?\u003c\/strong\u003e This gasket is specifically designed for the rectangular heater openings found in older 66 and 68 series as well as modern EG and SGO units; verify your specific section assembly via the manufacturer’s parts catalog.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWhat causes a heater cover plate gasket to fail?\u003c\/strong\u003e Over-tightening of studs, thermal shock, or the accumulation of sediment near the opening can compromise the seal over time, requiring a full replacement to prevent external leakage.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCan this gasket be trimmed for custom applications?\u003c\/strong\u003e This is a precision-cut OEM part intended for direct application; field modifications are not recommended as they may compromise the pressure rating of the seal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35644483980,"sku":"590-317-579","price":31.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/Pic_96f27886-b34a-42a0-8997-d79cdeb3f48e.jpg?v=1755718715"},{"product_id":"weil-mclain-383-500-095-valve","title":"Weil McLain 383-500-095 Valve","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 383-500-095 ASME Pressure Relief Valve\u003c\/strong\u003e is a critical safety component designed for \u003cstrong\u003ehydronic heating systems\u003c\/strong\u003e and \u003cstrong\u003eresidential gas boilers\u003c\/strong\u003e. This \u003cstrong\u003eOEM Weil McLain replacement part\u003c\/strong\u003e is engineered to activate precisely at \u003cstrong\u003e30 PSIG\u003c\/strong\u003e, preventing over-pressurization and potential vessel failure. Featuring a \u003cstrong\u003e3\/4\" NPT male inlet\u003c\/strong\u003e and a \u003cstrong\u003e3\/4\" FPT female outlet\u003c\/strong\u003e, this brass-bodied valve ensures a secure, leak-free connection. It is the direct \u003cstrong\u003ereplacement for part number 511-546-920\u003c\/strong\u003e and is commonly specified for high-efficiency units like the \u003cstrong\u003eWeil McLain Ultra\u003c\/strong\u003e and \u003cstrong\u003eECO Tec series\u003c\/strong\u003e. As an \u003cstrong\u003eASME-certified pressure valve\u003c\/strong\u003e, it meets stringent industry standards for capacity and reliability. For service technicians, this is the standard solution for \u003cstrong\u003eboiler pressure relief valve replacement\u003c\/strong\u003e when the existing unit exhibits \"weeping\" due to mineral buildup or failed internal seating. Using genuine parts ensures consistent performance and maintains the intended safety profile of the original equipment installation.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eASME Certified:\u003c\/strong\u003e Built to meet strict safety mandates for residential and commercial hydronic applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect OEM Fit:\u003c\/strong\u003e Eliminates piping modifications by using exact 3\/4\" NPT threading and a 30 PSI fixed set point.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBroad Compatibility:\u003c\/strong\u003e Found as a factory-standard component in popular Ultra-80, Ultra-105, and ECO Tec-80 gas boilers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Brass Construction:\u003c\/strong\u003e Resists corrosion and mineral scaling to ensure the spring-loaded mechanism remains operational.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eIs this valve a universal replacement for all boiler models?\u003c\/strong\u003e\u003cbr\u003e\nNo. While many residential boilers use a 3\/4\" 30 PSI valve, you must verify the specific part number in your manufacturer’s service manual. This specific 383-500-095 model is tailored for Weil McLain equipment and replaces older part number 511-546-920.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy is my current relief valve dripping or leaking?\u003c\/strong\u003e\u003cbr\u003e\nContinuous dripping—often called weeping—usually indicates a buildup of sediment on the valve seat, a failing expansion tank, or system pressure consistently reaching the 30 PSI threshold. Replacing the valve is the primary fix once system-wide pressure issues are ruled out.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan this valve be installed in any orientation?\u003c\/strong\u003e\u003cbr\u003e\nPressure relief valves should always be installed in the orientation specified by the boiler manufacturer and local mechanical codes, typically with the spindle in the vertical position and the discharge piping sloped for proper drainage.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35644512396,"sku":"383-500-095","price":48.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_81dee7b2-101a-4d6e-85c7-b2fb8dc00e0a.png?v=1755718714"},{"product_id":"weil-mclain-383-500-255-gasket","title":"Weil Mclain 383-500-255 Gasket","description":"\u003cp\u003eThe \u003cstrong\u003eWeil-McLain 383-500-255 Cover Plate Gasket\u003c\/strong\u003e is a critical OEM sealing component engineered specifically for \u003cstrong\u003eUltra Gas-Fired Water Boilers\u003c\/strong\u003e, including \u003cstrong\u003eUltra 155, 230, and 310 series\u003c\/strong\u003e units. High-efficiency condensing boilers demand a precise, airtight seal at the heat exchanger cover plate to maintain combustion integrity and prevent the escape of flue gases. This \u003cstrong\u003ereplacement boiler gasket\u003c\/strong\u003e is manufactured from high-grade, heat-resistant materials capable of withstanding the thermal cycling and corrosive condensate environments typical of modern hydronic systems. As a genuine \u003cstrong\u003eWeil-McLain boiler part\u003c\/strong\u003e, it ensures exact fitment with \u003cstrong\u003eM6 cover plate studs\u003c\/strong\u003e, facilitating a proper torque sequence and preventing potential leakage during high-fire operation. For service technicians performing annual maintenance or heat exchanger inspections, Replacing the \u003cstrong\u003eheat exchanger cover plate seal\u003c\/strong\u003e is standard protocol to ensure system efficiency and safety. This \u003cstrong\u003eboiler combustion gasket\u003c\/strong\u003e provides the density and resilience required for long-term reliability in commercial and residential heating applications.\u003c\/p\u003e\n\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOptimized Compatibility:\u003c\/strong\u003e Designed specifically for \u003cstrong\u003eWeil-McLain Ultra Series\u003c\/strong\u003e models 155, 230, and 310 to ensure a true \u003cstrong\u003eOEM fit\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHigh-Temperature Resistance:\u003c\/strong\u003e Constructed from advanced materials to maintain seal integrity under constant thermal expansion and contraction.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCombustion Safety:\u003c\/strong\u003e Provides a robust barrier against flue gas leakage, securing the interface between the \u003cstrong\u003ecover plate\u003c\/strong\u003e and the \u003cstrong\u003eheat exchanger\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStreamlined Installation:\u003c\/strong\u003e Precision-cut dimensions allow for quick alignment over \u003cstrong\u003emounting studs\u003c\/strong\u003e during rapid field servicing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should I replace the Weil-McLain 383-500-255 gasket?\u003c\/strong\u003e\u003cbr\u003e\nIndustry best practices dictate replacing the gasket every time the \u003cstrong\u003eheat exchanger cover plate\u003c\/strong\u003e is removed for cleaning or inspection. Reusing an old gasket can lead to improper seating and dangerous gas leaks.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this gasket compatible with the Ultra 80 or 105 models?\u003c\/strong\u003e\u003cbr\u003e\nNo, this specific part number is sized for the \u003cstrong\u003eUltra 155, 230, and 310\u003c\/strong\u003e. Smaller boiler models typically utilize a different gasket profile to match their specific heat exchanger geometry.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this part include the cover plate insulation or ignition electrode?\u003c\/strong\u003e\u003cbr\u003e\nThis item is the \u003cstrong\u003ecover plate gasket\u003c\/strong\u003e only. For a complete combustion overhaul, it is recommended to also inspect the \u003cstrong\u003e383-500-250 insulation\u003c\/strong\u003e and \u003cstrong\u003eignitor kits\u003c\/strong\u003e separately.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong style=\"color: red;\"\u003eThis item is not eligible for free shipping.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil Mclain","offers":[{"title":"Default Title","offer_id":35644550668,"sku":"383-500-255","price":28.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Pic_ec4dc6c0-0192-4a7f-b008-298204f96f8c.png?v=1755718713"},{"product_id":"weil-mclain-383-500-300-sensor","title":"Weil McLain 383-500-300 Sensor","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 383-500-300\u003c\/strong\u003e is an OEM-spec \u003cstrong\u003eReturn\/Supply Water Sensor\u003c\/strong\u003e designed for precision temperature regulation within hydronic systems. Engineers and technicians primarily utilize this 12k ohm NTC thermistor kit for \u003cstrong\u003eWeil McLain Ultra Series boilers\u003c\/strong\u003e, specifically supporting \u003cstrong\u003eUltra Gas Boiler models\u003c\/strong\u003e such as the \u003cstrong\u003eUltra 310\u003c\/strong\u003e and \u003cstrong\u003eUltra 80\u003c\/strong\u003e (Series 1 \u0026amp; 2). By delivering real-time data to the \u003cstrong\u003eU-Control module\u003c\/strong\u003e, it allows the unit to modulate firing rates based on accurate \u003cstrong\u003esupply and return water temperature\u003c\/strong\u003e differentials, preventing thermal shock and short-cycling.\u003c\/p\u003e\n\n\u003cp\u003eReplacing a failing \u003cstrong\u003ewater temperature sensor\u003c\/strong\u003e is critical for maintaining high-efficiency combustion and delta-T requirements. This kit provides an exact-fit replacement that eliminates common \u003cstrong\u003eboiler error codes\u003c\/strong\u003e associated with inaccurate resistance readings. Field professionals rely on this \u003cstrong\u003e383-500-300 sensor kit\u003c\/strong\u003e for its durable construction and seamless \u003cstrong\u003eboiler control board\u003c\/strong\u003e integration, ensuring the \u003cstrong\u003ehydronic heating system\u003c\/strong\u003e operates within the manufacturer's specified thermal parameters without nuisance lockouts.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecise Modulation:\u003c\/strong\u003e Provides accurate feedback to the \u003cstrong\u003eU-Control\u003c\/strong\u003e for optimized fuel-to-air ratios and temperature stability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Compatibility:\u003c\/strong\u003e Engineered specifically for \u003cstrong\u003eWeil McLain Ultra Gas\u003c\/strong\u003e units, ensuring electrical and physical fitment.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem Protection:\u003c\/strong\u003e Monitors return\/supply differentials to protect the \u003cstrong\u003eheat exchanger\u003c\/strong\u003e from rapid temperature fluctuations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCritical Replacement:\u003c\/strong\u003e Resolves sensor drift or failure that causes inconsistent \u003cstrong\u003eboiler cycling\u003c\/strong\u003e and decreased efficiency.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eWhat resistance should I see on the 383-500-300 sensor?\u003c\/strong\u003e\u003cbr\u003e\nThis is typically a 12k ohm NTC thermistor; verify resistance values against the \u003cstrong\u003eWeil McLain temperature\/resistance chart\u003c\/strong\u003e found in the boiler service manual for diagnosis.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use this on different Ultra boiler sizes?\u003c\/strong\u003e\u003cbr\u003e\nWhile commonly cited for \u003cstrong\u003eUltra 310\u003c\/strong\u003e and \u003cstrong\u003eUltra 80\u003c\/strong\u003e Series 1-2 models, always check your specific \u003cstrong\u003eunit serial number\u003c\/strong\u003e and parts list to confirm compatibility before installation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this kit include the mounting hardware?\u003c\/strong\u003e\u003cbr\u003e\nThe kit includes the primary \u003cstrong\u003esupply\/return sensor\u003c\/strong\u003e assembly. Secondary items like specialized \u003cstrong\u003esensor wells\u003c\/strong\u003e or \u003cstrong\u003ebulb retaining springs\u003c\/strong\u003e (e.g., part 383-500-305) may be required depending on the application.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35644614348,"sku":"383-500-300","price":48.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/ac-parts-1000x1000_4dcc51fa-1dc8-4dd6-ad55-698fac797fc9.webp?v=1755718713"},{"product_id":"weil-mclain-512-200-000-tube-burner","title":"Weil McLain 512-200-000 Tube Burner","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 512-200-000\u003c\/strong\u003e is an OEM \u003cstrong\u003eregular stainless tube burner\u003c\/strong\u003e engineered for high-performance combustion in \u003cstrong\u003eWeil McLain EG and EGH series boilers\u003c\/strong\u003e. This critical \u003cstrong\u003eboiler replacement part\u003c\/strong\u003e features a 1-inch diameter and a length of 21-3\/4 inches, ensuring a precise fit within the burner tray assembly. Built from heavy-gauge stainless steel, the \u003cstrong\u003emain burner tube\u003c\/strong\u003e is designed to resist corrosion and thermal fatigue, common issues in high-cycle atmospheric gas systems. For contractors, the \u003cstrong\u003e512-200-000 stainless burner\u003c\/strong\u003e offers a direct-drop replacement that maintains the integrity of the original \u003cstrong\u003egas burner assembly\u003c\/strong\u003e without the need for field modifications. Proper seating in the rear locating slots is essential; ensure openings face upward and the burner rests fully over the main orifices to prevent misfiring or uneven flame distribution. This component is foundational for restoring the AFUE efficiency of residential and light commercial gas-fired boilers while ensuring stable pilot ignition and consistent heat transfer across the heat exchanger sections.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Compatibility:\u003c\/strong\u003e Precision-engineered for a seamless fit in \u003cstrong\u003eWeil McLain EG and EGH boiler\u003c\/strong\u003e models.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Grade Construction:\u003c\/strong\u003e Fabricated from \u003cstrong\u003eregular stainless tube\u003c\/strong\u003e material to withstand harsh combustion environments and reduce oxidation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptimized Combustion:\u003c\/strong\u003e Designed to maintain the correct air-to-fuel ratio for reliable \u003cstrong\u003egas boiler burner\u003c\/strong\u003e performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContractor Grade:\u003c\/strong\u003e Streamlined installation process reduces labor time during annual maintenance or emergency repairs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWhich boiler models use the 512-200-000?\u003c\/strong\u003e It is specifically designed for Weil McLain EG (sizes 30-75) and EGH (sizes 85-125) gas-fired boilers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDoes this burner include the pilot bracket?\u003c\/strong\u003e No, this is the \"regular\" burner; if you need the version with the pilot mounting bracket, reference part number 512-200-001.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHow do I ensure the burner is seated correctly?\u003c\/strong\u003e The burner must be locked into the back slots with the openings facing up and the front resting securely over the gas orifice.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35644646348,"sku":"512-200-000","price":34.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/Pic_523ac195-f8bf-4395-8eb6-e2f1693e374c.jpg?v=1755718712"},{"product_id":"weil-mclain-512-200-078-burner","title":"Weil McLain 512-200-078 Burner","description":"\u003cp\u003eMaintain peak combustion efficiency with the \u003cstrong\u003eWeil McLain 512-200-078 Burner\u003c\/strong\u003e, a precision-engineered \u003cstrong\u003estainless steel burner tube\u003c\/strong\u003e designed for high-performance gas-fired residential and commercial boilers. This OEM component features an integrated \u003cstrong\u003epilot bracket\u003c\/strong\u003e to ensure stable flame sensing and reliable ignition cycles, minimizing nuisance lockouts in the field. Built from high-grade \u003cstrong\u003ecorrosion-resistant stainless steel\u003c\/strong\u003e, this \u003cstrong\u003ereplacement burner tube\u003c\/strong\u003e is a direct-fit solution for \u003cstrong\u003eWeil McLain CGa\u003c\/strong\u003e, CGi, and CG series boilers, making it an essential part for seasonal maintenance or troubleshooting combustion issues. Its durable construction withstands high thermal stress, providing consistent heating performance across \u003cstrong\u003enatural gas and propane (LP)\u003c\/strong\u003e systems. Whether you are performing a full rack replacement or addressing a single faulty port, this \u003cstrong\u003eboiler burner with pilot bracket\u003c\/strong\u003e delivers the exact specifications required for OEM-level safety and fluid heat distribution. Optimized for \u003cstrong\u003eHVAC ventilation\u003c\/strong\u003e and clean firing, it facilitates lower energy consumption and steady atmospheric draft operation.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Compatibility:\u003c\/strong\u003e Specifically engineered for \u003cstrong\u003eWeil McLain CG, CGa, and CGi\u003c\/strong\u003e series gas boilers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated Pilot Bracket:\u003c\/strong\u003e Provides precise alignment for the pilot assembly to ensure \u003cstrong\u003estable ignition\u003c\/strong\u003e and consistent flame rectification.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStainless Steel Construction:\u003c\/strong\u003e Offers superior resistance to oxidation and heat warping compared to standard steel tubes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal Fuel Support:\u003c\/strong\u003e Optimized for use in both \u003cstrong\u003enatural gas and LP gas\u003c\/strong\u003e burner manifolds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision Ports:\u003c\/strong\u003e Engineered for even flame distribution to maximize heat transfer across the heat exchanger.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eIs the 512-200-078 burner compatible with both natural gas and propane?\u003c\/strong\u003e\u003cbr\u003e\nYes, this \u003cstrong\u003eWeil McLain burner tube\u003c\/strong\u003e is designed to operate with either fuel type, provided the correct manifold orifices and gas valves are installed for the specific fuel application.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this part include the pilot assembly?\u003c\/strong\u003e\u003cbr\u003e\nThis SKU includes the \u003cstrong\u003eburner tube and the attached pilot bracket\u003c\/strong\u003e. The actual pilot burner, thermocouple, or spark igniter must be purchased separately if they require replacement.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan this burner be used in CGa Series 1 and Series 2 boilers?\u003c\/strong\u003e\u003cbr\u003e\nThis part is a standard replacement for most \u003cstrong\u003eCGa, CGi, and CG\u003c\/strong\u003e models. Always verify your specific boiler's serial number and parts list to ensure match with the 512-200-078 design.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong style=\"color: red;\"\u003eThis item is not eligible for free shipping.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35644658508,"sku":"512-200-078","price":37.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_98dee121-f629-4138-911e-6d382b96f225.jpg?v=1755718711"},{"product_id":"weil-mclain-510-218-045-pressure-gauge","title":"Weil McLain 510-218-045 Pressure Gauge","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 510-218-045 Steam Pressure Gauge\u003c\/strong\u003e is a critical replacement component designed for accurate monitoring of residential and commercial low-pressure steam systems. This \u003cstrong\u003eboiler pressure gauge\u003c\/strong\u003e features a specialized \u003cstrong\u003e0-30 PSIG range\u003c\/strong\u003e, though it is optimized for sensitivity in systems traditionally operating at lower pressures, ensuring the technician can identify minor fluctuations in manifold or header pressure. With a high-visibility \u003cstrong\u003e2 1\/2-inch dial\u003c\/strong\u003e and a standard \u003cstrong\u003e1\/4\" NPT male inlet\u003c\/strong\u003e, this gauge integrates seamlessly with \u003cstrong\u003eWeil McLain EG, EGH, and SGO boiler models\u003c\/strong\u003e and is typically installed on the steam trim assembly using a brass pigtail syphon to protect the internal bourdon tube from direct high-temperature steam contact.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits for HVAC Contractors:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecise Pressure Monitoring:\u003c\/strong\u003e Calibrated for 0-30 PSIG to provide reliable system diagnostics for low-pressure steam boilers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect OEM Compatibility:\u003c\/strong\u003e Engineered specifically for \u003cstrong\u003eWeil McLain steam boilers\u003c\/strong\u003e, ensuring accurate fitment and factory-standard performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnhanced Readability:\u003c\/strong\u003e The 2.5\" dial face allows for clear inspection during routine maintenance and pressure-trol adjustments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Built to withstand the harsh environments of mechanical rooms while maintaining calibration accuracy.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal Connection:\u003c\/strong\u003e Features a 1\/4\" NPT bottom mount connection for straightforward installation on standard pigtail syphons.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Questions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this gauge compatible with hot water boilers?\u003c\/strong\u003e\u003cbr\u003e\nNo, this specific part is designed for \u003cstrong\u003esteam pressure systems\u003c\/strong\u003e. While the physical threads may match, the internal mechanics and 30 PSI scale are optimized for steam trim applications. Using it for hydronic water pressure exceeding its range will result in component failure.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this gauge require a pigtail syphon?\u003c\/strong\u003e\u003cbr\u003e\nYes. To ensure a long service life and accurate readings, the 510-218-045 should always be installed with a water-filled pigtail (syphon pipe). This prevents live steam from entering the gauge and damaging the internal mechanism.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use this for a 15 PSI safety limit check?\u003c\/strong\u003e\u003cbr\u003e\nThis gauge is perfect for monitoring system operation; however, it is not a safety relief valve. It provides the visual feedback required to set your pressure-trol and ensure the system is operating within its designed 2-5 PSI window.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35644685516,"sku":"510-218-045","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_481a3ce8-f218-4fce-bb8b-07e1f060351c.jpg?v=1755718710"},{"product_id":"weil-mclain-510-350-211-delay-timer","title":"Weil McLain 510-350-211 Delay Timer","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 510-350-211 Delay Timer\u003c\/strong\u003e is a critical \u003cstrong\u003esolid state\u003c\/strong\u003e component designed to optimize burner ignition sequences in residential and commercial \u003cstrong\u003eboiler systems\u003c\/strong\u003e. Engineered for a \u003cstrong\u003e2 1\/2 minute delay on make\u003c\/strong\u003e, this \u003cstrong\u003e24-volt electrical delay timer\u003c\/strong\u003e prevents damaging short cycling by maintaining precise control over the duration between system calls and burner activation. For technicians servicing legacy Weil McLain CE boilers and electric furnaces, this genuine OEM part serves as a direct-fit solution for maintaining system integrity and energy efficiency. The solid-state design ensures reliability by eliminating mechanical wear, which is essential for protecting the primary controller and ignition components from premature failure. Incorporating this \u003cstrong\u003eHVAC delay timer\u003c\/strong\u003e into your maintenance protocols helps ensure steady heating operations and extends the operational life of the equipment. Whether you are performing a routine control check or troubleshooting a burner ignition lag, the 510-350-211 provides the exact timing specifications required for original equipment performance standards.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShort Cycling Prevention:\u003c\/strong\u003e The 150-second delay protects the compressor and burner components from rapid on\/off cycles.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Compatibility:\u003c\/strong\u003e Specifically engineered for \u003cstrong\u003eWeil McLain CE series boilers\u003c\/strong\u003e to ensure seamless integration with 24V control circuits.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSolid State Reliability:\u003c\/strong\u003e No moving parts means increased resistance to vibration and environmental wear compared to mechanical relays.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptimized Ignition:\u003c\/strong\u003e Provides the necessary buffer to allow system pressures or flue gases to stabilize before the next ignition cycle.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eIs the 510-350-211 compatible with modern Ultra series boilers?\u003c\/strong\u003e\u003cbr\u003e\nThis timer is primarily designed for CE series boilers and specific electric furnace applications; always verify the part number against the original wiring schematic before installation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat happens if the delay timer fails?\u003c\/strong\u003e\u003cbr\u003e\nA failed timer typically results in a burner that either fails to ignite or exhibits rapid cycling, which can lead to significant component strain and secondary system failures.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this part require a specific mounting orientation?\u003c\/strong\u003e\u003cbr\u003e\nAs a solid-state component, it is less sensitive to orientation than mechanical relays, but it should be installed within the control cabinet to protect it from moisture and extreme heat.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35644732428,"sku":"510-350-211","price":80.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_eb5451e4-5253-47a0-96aa-3d1100384ec4.jpg?v=1755718710"},{"product_id":"weil-mclain-591-391-798-cable","title":"Weil McLain 591-391-798 Cable","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 591-391-798\u003c\/strong\u003e is a critical \u003cstrong\u003eOEM ignition cable\u003c\/strong\u003e designed for high-performance spark delivery in commercial and residential boiler systems. This 36-inch \u003cstrong\u003eHVAC replacement part\u003c\/strong\u003e is engineered with a \u003cstrong\u003estraight boot\u003c\/strong\u003e configuration to ensure a secure, low-resistance connection to the \u003cstrong\u003eQ179C pilot burner\u003c\/strong\u003e. Built using AWG 14 wire and a high-temperature \u003cstrong\u003eXLPE 105 jacket\u003c\/strong\u003e, this lead is specifically rated to withstand the intense thermal environment of the combustion chamber without insulation breakdown or signal degradation.\u003c\/p\u003e\n\n\u003cp\u003eFor technicians servicing \u003cstrong\u003eWeil McLain EG, EGH, LGB, and MGB model boilers\u003c\/strong\u003e, this cable is the specified match for sizes 6-12 and 13-23. Utilizing \u003cstrong\u003egenuine Weil McLain parts\u003c\/strong\u003e ensures the \u003cstrong\u003eignition system\u003c\/strong\u003e maintains the precise timing and voltage required to prevent delayed ignition or nuisance fault codes. The straight boot design facilitates easy routing through tight cabinet spaces, providing a robust path for the \u003cstrong\u003ehigh-voltage spark\u003c\/strong\u003e necessary for reliable burner sequencing and consistent flame proofing.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Compatibility:\u003c\/strong\u003e Exact replacement for \u003cstrong\u003eWeil McLain 591-391-798\u003c\/strong\u003e, ensuring proper fitment on \u003cstrong\u003eQ179C pilot\u003c\/strong\u003e assemblies.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Heat Resilience:\u003c\/strong\u003e Features a durable \u003cstrong\u003eXLPE 105 insulation\u003c\/strong\u003e jacket that prevents arcing and maintains dielectric strength in high-temperature zones.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOptimized Conductivity:\u003c\/strong\u003e AWG 14 gauge wire provides stable electrical transfer for \u003cstrong\u003eintermittent pilot ignition\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Application:\u003c\/strong\u003e Standard 36-inch length allows for flexible routing across multiple \u003cstrong\u003eEG, EGH, LGB, and MGB series\u003c\/strong\u003e boiler sizes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eIs this cable compatible with secondary flame sensors?\u003c\/strong\u003e\u003cbr\u003e\nThis specific part is an igniter cable designed for the pilot assembly. While some systems use similar leads for sensing, always verify against the manufacturer’s wiring schematic for the specific LGB or MGB series you are servicing.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use this for a hot surface ignition (HSI) system?\u003c\/strong\u003e\u003cbr\u003e\nNo, this lead is engineered for spark-to-pilot ignition systems. HSI systems typically require different connector interfaces and wire ratings tailored to the silicon carbide or nitride igniters.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat are the signs of a failing ignition cable?\u003c\/strong\u003e\u003cbr\u003e\nLook for carbon tracking, visible cracks in the XLPE jacket, or brittle insulation near the boot. These issues often lead to intermittent spark failure or grounding, causing the boiler to cycle without establishing a flame.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35644775244,"sku":"591-391-798","price":39.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_cf89ba99-9d5d-4227-aad5-693ccb63e10e.jpg?v=1755718709"},{"product_id":"weil-mclain-510-300-014-spill-switch","title":"Weil McLain 510-300-014 Spill Switch","description":"\u003cp\u003eReplacing a tripped or faulty \u003cstrong\u003eWeil McLain 510-300-014\u003c\/strong\u003e is a standard safety procedure for service technicians maintaining \u003cstrong\u003eWeil McLain CGa\u003c\/strong\u003e, \u003cstrong\u003eCG\u003c\/strong\u003e, and \u003cstrong\u003eCGx gas boilers\u003c\/strong\u003e. This \u003cstrong\u003e240F Spill Switch M\/R\u003c\/strong\u003e is a critical safety control mounted on the draft hood to detect flue gas spillage caused by chimney blockages or downdraft conditions. As a \u003cstrong\u003emanual reset spill switch\u003c\/strong\u003e, it is designed to break the safety circuit and lock out the boiler once temperatures reach the 240-degree setpoint, forcing a technician to inspect the venting system before a restart. This OEM component, also identified as \u003cstrong\u003e510300014WT\u003c\/strong\u003e, is a direct-fit replacement for spark-ignited and standing pilot residential units. When troubleshooting a \u003cstrong\u003eboiler not firing\u003c\/strong\u003e, testing for continuity across the switch terminals while the reset button is depressed is a priority. Using the 240F rated \u003cstrong\u003espill switch 510-300-014\u003c\/strong\u003e ensures the system meets the original manufacturer's specifications for thermal protection and prevents nuisance tripping common with lower-rated substitutes.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Compatibility:\u003c\/strong\u003e Exact replacement for Weil McLain part numbers 510-300-014 and 510300014WT, ensuring seamless integration with existing safety circuits.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Thermal Sensitivity:\u003c\/strong\u003e Precision-calibrated to trip at 240°F (115°C) to protect against unsafe flue gas discharge.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManual Reset Mechanism:\u003c\/strong\u003e Incorporates a standard reset button that requires a physical check of the venting system, preventing automatic restarts under hazardous conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Built with industry-standard materials to withstand the high-heat environment of the draft hood assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eIs the 510-300-014 interchangeable with the 210F spill switch?\u003c\/strong\u003e\u003cbr\u003e\nNo. Each Weil McLain boiler model is specified for a specific temperature setpoint. Installing a 240F switch where a 210F is required could delay safety shutdowns, while installing a 210F where a 240F is required will lead to frequent nuisance trips.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo the wiring leads have polarity?\u003c\/strong\u003e\u003cbr\u003e\nThe leads for this spill switch do not have polarity; they can be connected to either terminal on the switch to complete the safety loop.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat causes this switch to trip frequently?\u003c\/strong\u003e\u003cbr\u003e\nFrequent tripping is typically an indicator of a venting issue, such as a blocked chimney, bird nest obstruction, or severe downdrafts. Always inspect the flue before resetting.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35644839052,"sku":"510-300-014","price":40.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_28ea5927-ff6c-42df-b72d-c8ed11cab36d.jpg?v=1755718708"},{"product_id":"weil-mclain-512-200-079-burner","title":"Weil McLain 512-200-079 Burner","description":"\u003cp\u003eWhen you are troubleshooting a \u003cstrong\u003eWeil McLain CG, CGa, or CGi boiler\u003c\/strong\u003e with ignition failures or roll-out issues, the \u003cstrong\u003eWeil McLain 512-200-079 Burner\u003c\/strong\u003e is the specific \u003cstrong\u003eOEM replacement burner\u003c\/strong\u003e required for a precise fit and reliable combustion. This \u003cstrong\u003estainless steel burner\u003c\/strong\u003e is engineered for high-temperature resistance and features an integrated \u003cstrong\u003espark bracket\u003c\/strong\u003e (also referred to as a pilot bracket) to ensure stable electrode positioning and consistent flame crossover. Measuring approximately 14.94 inches in length, this component is essential for maintaining the correct \u003cstrong\u003enatural gas or propane\u003c\/strong\u003e combustion profile within the heat exchanger. Utilizing \u003cstrong\u003egenuine Weil-McLain parts\u003c\/strong\u003e like the \u003cstrong\u003e512-200-079\u003c\/strong\u003e prevents the common harmonics and delayed ignition \"bang\" often associated with inferior universal alternatives. Designed for professional contractors, this assembly facilitates rapid installation during routine maintenance or full manifold rebuilds to restore peak thermal efficiency and safety in \u003cstrong\u003eresidential hydronic systems\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits for Technicians:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Compatibility:\u003c\/strong\u003e Exact \u003cstrong\u003eOEM replacement\u003c\/strong\u003e for \u003cstrong\u003eWeil-McLain CG series\u003c\/strong\u003e boilers, ensuring proper venturi alignment and orifice spacing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorrosion Resistance:\u003c\/strong\u003e High-grade \u003cstrong\u003estainless steel construction\u003c\/strong\u003e prevents premature oxidation and clogging of the burner ports.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Spark Bracket:\u003c\/strong\u003e Securely holds the pilot or spark igniter in the factory-spec position for reliable light-offs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Combustion:\u003c\/strong\u003e Precision-drilled ports provide a stable, blue flame to maximize fuel efficiency and minimize carbon monoxide production.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions \u0026amp; Technical Support:\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this burner support both Natural Gas and Liquid Propane systems?\u003c\/strong\u003e\u003cbr\u003e\nYes, the \u003cstrong\u003eWeil McLain 512-200-079\u003c\/strong\u003e is designed to operate with both \u003cstrong\u003eNG and LP\u003c\/strong\u003e fuel types, provided it is used with the correct manifold orifices for the specific gas pressure of the appliance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWill this resolve a \"delayed ignition\" or \"booming\" sound at startup?\u003c\/strong\u003e\u003cbr\u003e\nIf the existing burner ports are warped or the \u003cstrong\u003espark bracket\u003c\/strong\u003e is bent, it can cause delayed crossover. Replacing the assembly with this \u003cstrong\u003estainless steel burner\u003c\/strong\u003e often corrects these combustion timing issues.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs the spark electrode included with the burner?\u003c\/strong\u003e\u003cbr\u003e\nThis SKU includes the burner tube and the attached bracket. The igniter\/electrode itself is typically sold separately or can be transferred if it remains in serviceable condition.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35644854732,"sku":"512-200-079","price":40.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/Pic_d6cb7faf-5d95-46e6-8ad7-a3672d72f78c.jpg?v=1755718707"},{"product_id":"510-218-099","title":"Weil McLain 510-218-099 Gauge","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 510-218-099\u003c\/strong\u003e is a high-precision, dual-purpose \u003cstrong\u003ecombination pressure-temperature gauge\u003c\/strong\u003e designed for immediate integration into hydronic heating systems. Engineered for reliability in standard residential and light commercial boiler applications, this \u003cstrong\u003eOEM replacement gauge\u003c\/strong\u003e features a 2.5-inch high-visibility dial with a dual-scale interface, providing simultaneous readouts for system pressure and water temperature. The analog display supports \u003cstrong\u003eboiler pressure monitoring\u003c\/strong\u003e from 0–60 PSI and temperature tracking across a range of 60°F to 320°F (or 250°F depending on specific system limits), ensuring your equipment operates within calibrated safety parameters.\u003c\/p\u003e\n\n\u003cp\u003eThis \u003cstrong\u003eT\u0026amp;P gauge\u003c\/strong\u003e utilizes a 1\/4\" NPT back connection for a secure, leak-proof fit into the boiler shell or tapping port. Specifically compatible with a wide array of \u003cstrong\u003eWeil McLain boiler models\u003c\/strong\u003e, including the CG, GV, HE, and 88 series, it is a critical diagnostic component for maintaining system efficiency. Field technicians will appreciate the short-shank design, which facilitates installation in tight clearances where standard gauges may struggle to fit. By replacing a fouled or cracked original unit with this \u003cstrong\u003eWeil McLain 510-218-099\u003c\/strong\u003e, you restore accurate real-time feedback essential for preventing over-pressurization and thermal stress on the heat exchanger.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual-Function Monitoring:\u003c\/strong\u003e Provides integrated pressure and temperature readings to simplify \u003cstrong\u003eboiler diagnostics\u003c\/strong\u003e and routine maintenance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Compatibility:\u003c\/strong\u003e Exact replacement for \u003cstrong\u003eWeil McLain boilers\u003c\/strong\u003e, ensuring accurate calibration and thread compatibility with 1\/4\" back-mount ports.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProfessional Grade Accuracy:\u003c\/strong\u003e Features 2.5-inch dial for precise viewing of PSI and Fahrenheit levels, vital for hydronic system balancing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Built to withstand the constant thermal cycling and vibration of active \u003cstrong\u003ehydronic heating systems\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions:\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWhich Weil McLain models are compatible with the 510-218-099 gauge?\u003c\/strong\u003e This gauge is widely used across the CG, GV, HE, HE II, VHE, and 88 series boilers, serving as a standard \u003cstrong\u003eWeil McLain replacement part\u003c\/strong\u003e for most water trim configurations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDoes this gauge require a separate temperature well?\u003c\/strong\u003e No, this is a direct-immersion \u003cstrong\u003ecombination pressure-temperature gauge\u003c\/strong\u003e that installs directly into a 1\/4-inch NPT tapping to measure both metrics from a single point.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWhat is the maximum pressure rating for this T\u0026amp;P gauge?\u003c\/strong\u003e The \u003cstrong\u003eWeil McLain 510-218-099\u003c\/strong\u003e is rated for a maximum system pressure of 60 PSI, making it ideal for standard low-pressure residential hot water boilers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35644915788,"sku":"510-218-099","price":41.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/Pic_83e0a693-c420-4313-8208-c0bd884a5a60.png?v=1755718707"},{"product_id":"weil-mclain-512-200-023-burner","title":"Weil McLain 512-200-023 Burner","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 512-200-023 Burner\u003c\/strong\u003e is a critical combustion component engineered for high-efficiency performance in \u003cstrong\u003ePFG series boilers\u003c\/strong\u003e. This \u003cstrong\u003etubular steel burner\u003c\/strong\u003e is designed to withstand extreme thermal cycles, ensuring consistent flame stabilization and efficient fuel-to-air mixing in \u003cstrong\u003ecommercial gas boilers\u003c\/strong\u003e. Featuring an integrated \u003cstrong\u003epilot bracket\u003c\/strong\u003e, this assembly facilitates precise alignment of the \u003cstrong\u003epilot assembly\u003c\/strong\u003e, which is essential for reliable \u003cstrong\u003eboiler ignition\u003c\/strong\u003e and flame proving. For technicians performing \u003cstrong\u003eHVAC system maintenance\u003c\/strong\u003e or \u003cstrong\u003eboiler repair\u003c\/strong\u003e, this genuine \u003cstrong\u003eOEM burner tube\u003c\/strong\u003e ensures a direct-fit replacement that restores the original equipment specifications and manifold pressure balance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Boiler Service Questions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHow can I tell if a burner tube has failed?\u003c\/strong\u003e Look for signs of \"sooting,\" yellow tipping on the flame, or visible cracking\/corrosion on the \u003cstrong\u003etubular steel\u003c\/strong\u003e body which indicates metal fatigue.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIs this compatible with more than just PFG models?\u003c\/strong\u003e While primarily specified for the \u003cstrong\u003ePFG boiler line\u003c\/strong\u003e, always verify your specific \u003cstrong\u003eWeil McLain burner\u003c\/strong\u003e part number against the factory parts list or manufacturer's technical guide.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoes the pilot bracket include the pilot burner?\u003c\/strong\u003e No, this is the \u003cstrong\u003eburner tube with pilot bracket\u003c\/strong\u003e only; the pilot assembly itself must be sourced separately.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eTechnical Benefits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Heavy-duty \u003cstrong\u003etubular steel\u003c\/strong\u003e resists warping and carbon buildup under high-output firing conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise Pilot Alignment:\u003c\/strong\u003e The welded \u003cstrong\u003epilot bracket\u003c\/strong\u003e ensures the flame sensor and \u003cstrong\u003eigniter\u003c\/strong\u003e remain in the optimal strike zone for rapid ignition.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved Combustion:\u003c\/strong\u003e Engineered porting allows for a clean \u003cstrong\u003eblue flame\u003c\/strong\u003e pattern, reducing the risk of short-cycling and operational downtime.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Reliability:\u003c\/strong\u003e Built to \u003cstrong\u003eWeil McLain\u003c\/strong\u003e factory standards to maintain the combustion integrity of your \u003cstrong\u003ehydronic heating system\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong style=\"color: red;\"\u003eThis item is not eligible for free shipping.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35645113228,"sku":"512-200-023","price":45.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Pic_b3cd1941-d8da-48ab-aba5-fe93ff31b9a6.png?v=1755718706"},{"product_id":"weil-mclain-590-317-305-blanket","title":"Weil McLain 590-317-305 Gasket","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 590-317-305\u003c\/strong\u003e is a professional-grade \u003cstrong\u003ewoven fiberglass gasket\u003c\/strong\u003e specifically engineered for high-temperature sealing on \u003cstrong\u003ecleanout plates\u003c\/strong\u003e. Designed to maintain an airtight and gas-tight seal, this gasket prevents combustion byproduct leakage and ensures pressure integrity within the boiler heat exchanger. Measuring approximately \u003cstrong\u003e2.0 x 0.25 x 14.5 inches\u003c\/strong\u003e, this component is built to withstand the rigorous cycling associated with residential and commercial hydronic heating systems. Using a \u003cstrong\u003ereplacement boiler gasket\u003c\/strong\u003e that meets exact OEM specifications is critical for maintaining flue gas safety and system efficiency. This \u003cstrong\u003efiberglass cleanout plate gasket\u003c\/strong\u003e offers superior chemical resistance and thermal stability compared to generic alternatives. When performing annual maintenance or a heat exchanger inspection, replacing the \u003cstrong\u003ecleanout plate seal\u003c\/strong\u003e is a standard best practice to prevent carbon monoxide leaks and ensure the vacuum pressure remains within manufacturer tolerances. Trust the \u003cstrong\u003e590-317-305 gasket\u003c\/strong\u003e for a precise fit on compatible Weil McLain boiler sections.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Temperature Durability:\u003c\/strong\u003e The woven fiberglass construction is rated for extreme thermal environments, ensuring the seal does not degrade under localized heat stress.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision Fit:\u003c\/strong\u003e Sized at \u003cstrong\u003e14.5 inches\u003c\/strong\u003e in length to provide full perimeter coverage of the cleanout port for a total gas-tight interface.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLeak Prevention:\u003c\/strong\u003e Acts as a critical barrier against flue gas bypass, protecting the mechanical room from combustion odors and hazardous exhaust.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChemical Resistance:\u003c\/strong\u003e Designed to resist the corrosive effects of condensate and combustion residues found in modern hydronic systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWhen should this gasket be replaced?\u003c\/strong\u003e Technicians should replace the \u003cstrong\u003e590-317-305\u003c\/strong\u003e whenever the cleanout plate is removed for heat exchanger cleaning or if soot spotting is visible around the plate edges.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIs it compatible with other brands?\u003c\/strong\u003e This gasket is specifically spec'd for \u003cstrong\u003eWeil McLain boiler maintenance\u003c\/strong\u003e; always verify your specific model's parts list to ensure the dimensions match your cleanout assembly.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDoes this require adhesive?\u003c\/strong\u003e While the woven material provides a natural friction fit against the plate, ensure the sealing surface is wire-brushed clean for the best metal-to-gasket contact.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35645181388,"sku":"590-317-305","price":49.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/Pic_6eab954e-db59-4823-828a-d285abe122e9.png?v=1755718705"},{"product_id":"weil-mclain-383-500-045-assembly","title":"Weil McLain 383-500-045 Assembly","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 383-500-045 Ignitor\/Flame Rod Assembly\u003c\/strong\u003e is a precision-engineered \u003cstrong\u003eignition electrode kit\u003c\/strong\u003e designed specifically for the \u003cstrong\u003eWeil-McLain Ultra Gas Boiler\u003c\/strong\u003e series. As a critical component in the combustion cycle, this \u003cstrong\u003edual-purpose electrode\u003c\/strong\u003e facilitates both high-voltage spark ignition and continuous \u003cstrong\u003eflame rectification\u003c\/strong\u003e to ensure safe, efficient burner operation. This OEM kit is compatible with Ultra Series 3, 3UE, and CT gas boilers across all BTU sizes. The assembly includes the \u003cstrong\u003ereplacement ignitor\u003c\/strong\u003e, high-temperature \u003cstrong\u003egasket\u003c\/strong\u003e, suppressor, and necessary mounting hardware to restore reliable \u003cstrong\u003eboiler ignition\u003c\/strong\u003e and prevent nuisance \"no flame\" lockouts caused by carbon fouling or ceramic degradation. For field technicians, this \u003cstrong\u003e383-500-045 assembly\u003c\/strong\u003e provides a direct-fit solution that meets exact manufacturer tolerances for gap spacing and signal strength, ensuring the \u003cstrong\u003eflame sensor\u003c\/strong\u003e accurately communicates with the integrated boiler control module during every firing sequence.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBroad Compatibility:\u003c\/strong\u003e Engineered for use in \u003cstrong\u003eUltra Gas Series 3\u003c\/strong\u003e, 3UE, and CT model gas-fired water boilers.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDual Functionality:\u003c\/strong\u003e Operates as both an \u003cstrong\u003eignition electrode\u003c\/strong\u003e and a \u003cstrong\u003eflame rod\u003c\/strong\u003e for streamlined diagnostics and parts management.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eComplete Service Kit:\u003c\/strong\u003e Includes the \u003cstrong\u003e383-500-045 ignitor\u003c\/strong\u003e, thermal gasket, suppressor, and hardware for a professional-grade installation.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOEM Reliability:\u003c\/strong\u003e Maintains the factory-specified \u003cstrong\u003eflame ionization\u003c\/strong\u003e current required for safe and efficient combustion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eWhat boiler models use the 383-500-045 ignitor?\u003c\/strong\u003e\u003cbr\u003e\nThis \u003cstrong\u003eaftermarket-compatible OEM kit\u003c\/strong\u003e is the standard replacement for all sizes of the \u003cstrong\u003eWeil McLain Ultra\u003c\/strong\u003e Series 3 boilers, as well as the 3UE and CT variants.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow do I resolve a Weil McLain Ultra ignition lockout?\u003c\/strong\u003e\u003cbr\u003e\nPersistent lockouts are often caused by a worn \u003cstrong\u003eflame sensor\u003c\/strong\u003e. Testing for continuity or replacing the \u003cstrong\u003e383-500-045 assembly\u003c\/strong\u003e typically restores the proper ionization signal needed to maintain the burner circuit.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs the gasket included in this ignition electrode kit?\u003c\/strong\u003e\u003cbr\u003e\nYes, the \u003cstrong\u003eWeil-McLain 383-500-045\u003c\/strong\u003e includes a high-grade \u003cstrong\u003enitrile or ceramic fiber gasket\u003c\/strong\u003e to ensure an airtight seal between the electrode and the boiler cover plate.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35645226444,"sku":"383-500-045","price":60.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/Pic_7d1674b5-b008-4463-a757-fa4062ed063c.jpg?v=1755718704"},{"product_id":"weil-mclain-510-350-223-relay","title":"Weil McLain 510-350-223 Relay","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 510-350-223 Plug-In Relay\u003c\/strong\u003e is a critical component for specialized switching in hydronic heating systems. Engineered with a \u003cstrong\u003eDPST contact configuration\u003c\/strong\u003e and a \u003cstrong\u003e24V holding coil\u003c\/strong\u003e, this relay provides reliable circuit control for \u003cstrong\u003eWeil McLain gas boilers\u003c\/strong\u003e, including the CGA, CGx, EG, and PFG series. Designed for secondary or auxiliary circuit management, it features a rugged \u003cstrong\u003ehigh-amperage capacity\u003c\/strong\u003e—rated up to 25A at 30VDC and 10A at 250VAC—to handle demanding inductive loads from \u003cstrong\u003ecirculator pumps\u003c\/strong\u003e and zone valves. As a direct \u003cstrong\u003eOEM replacement part\u003c\/strong\u003e, it ensures seamless integration with existing control boards and wiring harnesses without the need for field modifications. This \u003cstrong\u003eindustrial-grade relay\u003c\/strong\u003e is a standard inventory item for contractors servicing aging residential systems where precise signal transfer and reliable mechanical switching are required to maintain boiler safety sequences.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits for Technicians:\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-Model Compatibility:\u003c\/strong\u003e Verified for use across a wide range of heritage and current equipment, including \u003cstrong\u003eHE, VHE, and AHE boiler series\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEfficient Field Service:\u003c\/strong\u003e The \u003cstrong\u003eplug-in design\u003c\/strong\u003e allows for rapid seat-and-socket installation, reducing downtime during emergency service calls.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRobust Electrical Ratings:\u003c\/strong\u003e Features \u003cstrong\u003edouble pole single throw\u003c\/strong\u003e contacts capable of handling higher inrush currents typical of \u003cstrong\u003eHVAC motor starters\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandardized Voltage:\u003c\/strong\u003e Operates on a standard \u003cstrong\u003e24VAC control circuit\u003c\/strong\u003e, simplifying diagnostic testing and voltage drop troubleshooting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions:\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCan this replace the older 70-828 relay?\u003c\/strong\u003e Yes, the 510-350-223 is the designated technical replacement for the legacy 70-828 and 70-213 relay configurations.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMy existing relay has fewer pins; will this work?\u003c\/strong\u003e While this model may include additional contact tabs for expanded functionality, it retains the base pinout for standard \u003cstrong\u003eWeil McLain control modules\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWhat systems use this specific relay?\u003c\/strong\u003e It is primarily utilized in \u003cstrong\u003espark ignition\u003c\/strong\u003e and standing pilot gas boilers for managing pump and signal relay logic.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35645226700,"sku":"510-350-223","price":44.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_20bcfd8e-c875-496c-a67e-38cd551ef709.jpg?v=1755718704"},{"product_id":"381-356-578","title":"Weil Mclain 381-356-578 Transformer","description":"\u003cp\u003eFor veteran contractors servicing residential gas boilers, the \u003cstrong\u003eWeil McLain 381-356-578 Transformer\u003c\/strong\u003e is the dedicated OEM replacement for domestic water and hydronic heating controls. This \u003cstrong\u003e120\/24 Volt, 40 VA\u003c\/strong\u003e foot-mount control transformer is engineered specifically for the \u003cstrong\u003eWeil McLain CGa\u003c\/strong\u003e (Series 2 and 3) and \u003cstrong\u003eGV90+\u003c\/strong\u003e (Series 2) residential boiler lines. Providing a stable \u003cstrong\u003e24V secondary output\u003c\/strong\u003e, it delivers the necessary 1.67 amps required to power critical low-voltage components, including ignition modules, gas valve solenoids, and zone relays.\u003c\/p\u003e\n\n\u003cp\u003eField technicians will appreciate the rugged, compact design that allows for clean \u003cstrong\u003efoot-mount installation\u003c\/strong\u003e within tight control cabinets. Unlike universal multi-tap alternatives, this genuine \u003cstrong\u003eboiler control transformer\u003c\/strong\u003e maintains factory-specified electrical characteristics, preventing chattering relays or control board resets common with under-powered secondary circuits. When diagnosing \u003cstrong\u003eWeil McLain boiler parts\u003c\/strong\u003e, ensuring a consistent volt-ampere rating is vital for maintaining the duty cycle of integrated \u003cstrong\u003eHVAC control systems\u003c\/strong\u003e. Replace failing units with this high-efficiency \u003cstrong\u003estep-down transformer\u003c\/strong\u003e to restore reliable 24V power to the burner secondary circuit.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOEM Compatibility:\u003c\/strong\u003e Specifically designed for \u003cstrong\u003eWeil McLain CGa\u003c\/strong\u003e and \u003cstrong\u003eGV90+\u003c\/strong\u003e series gas boilers.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStable Power Delivery:\u003c\/strong\u003e Rated at \u003cstrong\u003e40 VA\u003c\/strong\u003e to provide consistent 1.67-amp current for \u003cstrong\u003e24V boiler controls\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDirect Fit:\u003c\/strong\u003e \u003cstrong\u003eFoot-mount configuration\u003c\/strong\u003e ensures easy mounting and proper alignment with existing wiring harnesses.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eQuiet Operation:\u003c\/strong\u003e High-quality windings reduce magnetic vibration and audible humming during long heating cycles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the symptoms of a failing 40 VA transformer?\u003c\/strong\u003e\u003cbr\u003e\nTechnicians often see chattering contactors, thermostats that constantly reboot, or the gas valve failing to pull in even when the board sends a signal. Measuring the secondary side under load will often show a voltage drop below 18-20V if the internal windings are compromised.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use this for multiple zone valve applications?\u003c\/strong\u003e\u003cbr\u003e\nA \u003cstrong\u003e40 VA transformer\u003c\/strong\u003e can typically handle the boiler’s internal controls and one or two low-draw zone valves. If you are powering more than three \u003cstrong\u003eTaco zone valves\u003c\/strong\u003e or high-draw WiFi thermostats, verify the total amperage to ensure the 1.67-amp limit is not exceeded.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this a multi-tap transformer or dedicated 120V?\u003c\/strong\u003e\u003cbr\u003e\nThis is a dedicated \u003cstrong\u003e120\/24 Volt transformer\u003c\/strong\u003e. It is designed for a 120V primary input; always verify the primary line voltage at the boiler junction box before installation to prevent damage to the secondary windings.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil Mclain","offers":[{"title":"Default Title","offer_id":35645233356,"sku":"381-356-578","price":47.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/weil-mclain-381-356-578-transformer-18_6d8a4c5a-404b-425f-845a-3c47ad4443c4.png?v=1755718703"},{"product_id":"weil-mclain-383-500-628-transformer","title":"Weil McLain 383-500-628 Transformer","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 383-500-628 Transformer\u003c\/strong\u003e is a heavy-duty, factory-specified \u003cstrong\u003e120V to 24V step-down transformer\u003c\/strong\u003e designed for critical power distribution within high-efficiency hydronic systems. This \u003cstrong\u003e50VA boiler transformer\u003c\/strong\u003e provides a stable 24VAC secondary output, ensuring consistent low-voltage signaling for the \u003cstrong\u003eWeil McLain Ultra boiler control board\u003c\/strong\u003e and ignition sequences. As a direct replacement for the legacy \u003cstrong\u003e511-802-011\u003c\/strong\u003e, it is engineered to handle the electrical load requirements of \u003cstrong\u003eWeil McLain Ultra Gas\u003c\/strong\u003e and \u003cstrong\u003eUltra Commercial\u003c\/strong\u003e models (sizes 550 and 750). The high-amperage capacity prevents control voltage drops during simultaneous component activation, such as gas valve solenoids and inducer relays. Built for the high-temperature environments of professional mechanical rooms, this \u003cstrong\u003eOEM Weil McLain electrical part\u003c\/strong\u003e ensures precise 120V primary isolation and is essential for maintaining the operational integrity of commercial heating equipment. Precise terminal termination and iron-core efficiency make it the standard choice for service technicians performing \u003cstrong\u003ehydronic heating system repair\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Compatibility:\u003c\/strong\u003e Specifically engineered as the direct replacement for Ultra Series Gas and Commercial boilers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Power Capacity:\u003c\/strong\u003e Rated at 50VA to support complex control circuits and multiple low-voltage accessories without overheating.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReliable Voltage Conversion:\u003c\/strong\u003e Accurately steps down 120V line voltage to a steady 24V output to protect sensitive logic modules.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSimplified Integration:\u003c\/strong\u003e Standardized mounting footprint and terminal layout reduce downtime during field replacements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the 383-500-628 replace the older 511-802-011 model?\u003c\/strong\u003e\u003cbr\u003e\nYes, this part is the official factory-designated replacement for the 511-802-011 and meets all original electrical specifications for the Ultra series.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this transformer compatible with other boiler brands?\u003c\/strong\u003e\u003cbr\u003e\nWhile it provides a standard 120V\/24V 50VA output, it is specifically configured for Weil McLain mounting brackets and harness connections found in the Ultra series. Field-fitting in other brands is not recommended.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow do I verify if the 50VA rating is sufficient for my system?\u003c\/strong\u003e\u003cbr\u003e\nThe 50VA rating is optimized for the factory control configurations of the Ultra 550 and 750 models. If you have added significant external zone valves or heavy secondary loads, verify total VA draw before installation.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35645234956,"sku":"383-500-628","price":74.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_d5c950bc-1c52-4261-a029-cf125b5dd488.png?v=1755718702"},{"product_id":"weil-mclain-383-500-020-inspection-glass-kit","title":"Weil McLain 383-500-020 Inspection Glass Kit","description":"\u003cp\u003eFor high-efficiency boiler maintenance, the \u003cstrong\u003eWeil McLain 383-500-020 Inspection Glass Kit\u003c\/strong\u003e is the essential OEM solution for monitoring combustion and flame quality in \u003cstrong\u003eUltra Series 1 and 2 boilers\u003c\/strong\u003e. This complete assembly is critical for identifying potential burner issues or soot buildup without compromising the sealed combustion environment. As a professional-grade \u003cstrong\u003eboiler sight glass replacement\u003c\/strong\u003e, it includes the high-temperature borosilicate glass, a mounting bracket, a resilient high-heat gasket, and the necessary hardware to ensure a gas-tight seal.\u003c\/p\u003e\n\n\u003cp\u003eReplacing a clouded or cracked sight glass is a standard requirement during annual \u003cstrong\u003ehydronic heating system service\u003c\/strong\u003e to maintain peak operational safety and fuel efficiency. This \u003cstrong\u003egenuine Weil McLain part\u003c\/strong\u003e is engineered to withstand the rigorous thermal cycling and positive pressures typical of the Ultra gas boiler heat exchanger. By utilizing this \u003cstrong\u003eHVAC inspection port kit\u003c\/strong\u003e, technicians can provide precise visual diagnostics, ensuring the burner assembly is firing correctly and minimizing the risk of unplanned downtime in commercial or residential applications.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003eEnsures accurate visual monitoring of \u003cstrong\u003eU-155, U-230, and U-310 boiler\u003c\/strong\u003e flame characteristics.\u003c\/li\u003e\n  \u003cli\u003eIncludes a specialized \u003cstrong\u003ehigh-temperature gasket\u003c\/strong\u003e to prevent exhaust leaks and maintain combustion integrity.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM direct fit\u003c\/strong\u003e eliminates the need for field modifications, ensuring rapid installation during service calls.\u003c\/li\u003e\n  \u003cli\u003eRestores the ability to perform safety inspections required for \u003cstrong\u003econdensing gas boiler maintenance\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eIs this kit compatible with Series 3 Ultra boilers?\u003c\/strong\u003e\u003cbr\u003e\nNo, the 383-500-020 is specifically designed for \u003cstrong\u003eWeil McLain Ultra Series 1 and Series 2\u003c\/strong\u003e units. Series 3 models typically require different internal components.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this include the physical hardware for the bracket?\u003c\/strong\u003e\u003cbr\u003e\nYes, this \u003cstrong\u003ecomplete sight glass assembly\u003c\/strong\u003e includes the bracket, glass, gasket, and the specific screws or fasteners needed for a full replacement.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is my current inspection glass clouded?\u003c\/strong\u003e\u003cbr\u003e\nClouding or \"crazing\" is often caused by long-term exposure to combustion byproducts or condensation. Replacing the glass is necessary to maintain a clear view of the burner flame.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35645265036,"sku":"383-500-020","price":47.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/Pic_18541694-3868-4208-af68-5d0b9f237e9b.jpg?v=1755718702"},{"product_id":"weil-mclain-512-200-050-regular-burner","title":"Weil McLain 512-200-050 Regular Burner","description":"\u003cp\u003eThe \u003cstrong\u003eWeil-McLain 512-200-050 Regular Burner\u003c\/strong\u003e is a critical \u003cstrong\u003eOEM replacement part\u003c\/strong\u003e engineered for high-output \u003cstrong\u003eWeil-McLain LGB series boilers\u003c\/strong\u003e. As a veteran tech knows, maintaining industrial-scale hydronic systems requires precise combustion components to prevent soot buildup and inefficient fuel consumption. This \u003cstrong\u003etubular steel burner\u003c\/strong\u003e is manufactured to rigorous tolerances, providing a stable flame pattern and consistent \u003cstrong\u003eboiler heat transfer\u003c\/strong\u003e. Its heavy-gauge construction resists the thermal stresses common in high-demand commercial environments, ensuring long-term structural integrity compared to generic alternatives. When performing a \u003cstrong\u003ecommercial boiler repair\u003c\/strong\u003e, utilizing this genuine \u003cstrong\u003eWeil-McLain burner tube\u003c\/strong\u003e preserves the original equipment's combustion specifications and venting requirements. Designed for seamless integration into the \u003cstrong\u003eLGB burner manifold\u003c\/strong\u003e, it supports optimal manifold pressure and uniform heat distribution across the heat exchanger. This is the primary component for technicians seeking to restore factory-spec \u003cstrong\u003eHVAC combustion efficiency\u003c\/strong\u003e and system reliability in \u003cstrong\u003eWeil-McLain LGB boilers\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal LGB Compatibility:\u003c\/strong\u003e Specifically engineered as a direct-fit \u003cstrong\u003ereplacement burner for Weil-McLain LGB boilers\u003c\/strong\u003e, eliminating field modifications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTubular Steel Durability:\u003c\/strong\u003e Rugged material composition prevents warping and corrosion under high operational temperatures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Combustion:\u003c\/strong\u003e Precision-drilled ports ensure even gas flow and \u003cstrong\u003ereliable ignition\u003c\/strong\u003e across the entire burner length.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Standards:\u003c\/strong\u003e Genuine Weil-McLain part ensures the system maintains its original ASHRAE and efficiency ratings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs the 512-200-050 compatible with all LGB configurations?\u003c\/strong\u003e\u003cbr\u003e\nYes, this is the standard regular burner used across the LGB series. However, always verify your specific \u003cstrong\u003eboiler section count\u003c\/strong\u003e and gas type (Natural or Propane) to ensure the orifice size matches the manifold requirements.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat are the signs that a tubular steel burner needs replacement?\u003c\/strong\u003e\u003cbr\u003e\nLook for heavy oxidation, clogged ports that cause \"lifting\" flames, or visible cracks in the steel. If you observe \u003cstrong\u003edelayed ignition\u003c\/strong\u003e or yellow tipping, the burner tube may be compromised.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan this burner be used in residential Weil-McLain units like the CGi or GV?\u003c\/strong\u003e\u003cbr\u003e\nNo, this part is strictly for \u003cstrong\u003ecommercial LGB boilers\u003c\/strong\u003e. Residential units utilize different burner geometries and mounting hardware.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong style=\"color: red;\"\u003eThis item is not eligible for free shipping.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35645269132,"sku":"512-200-050","price":49.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Pic_9d5c267e-1eb4-4410-af6e-15add0aa2f8c.png?v=1765514069"},{"product_id":"weil-mclain-382-200-375-kit","title":"Weil McLain 382-200-375 Switch Kit","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 382-200-375 Block Temperature Switch Kit\u003c\/strong\u003e is a critical safety component designed for precise thermal monitoring in \u003cstrong\u003eGV90+ and GV series boilers\u003c\/strong\u003e. As a veteran-grade \u003cstrong\u003eOEM replacement part\u003c\/strong\u003e, this kit ensures the heat exchanger block operates within safe parameters, preventing catastrophic equipment failure due to localized overheating. The \u003cstrong\u003eblock temperature limit switch\u003c\/strong\u003e is engineered with a calibrated 350°F open and 250°F close setpoint, providing a reliable electrical interrupt when thermal limits are reached. This kit includes the snap-action switch and the necessary mounting bracket to maintain direct contact with the boiler block for accurate sensing.\u003c\/p\u003e\n\n\u003cp\u003eFor service technicians, installing this \u003cstrong\u003egenuine Weil McLain kit\u003c\/strong\u003e is a standard procedure when troubleshooting \u003cstrong\u003eboiler lockout codes\u003c\/strong\u003e or intermittent shut-offs. Proper seating of the bracket is essential to ensure responsive heat transfer and to avoid nuisance tripping. Integrating this \u003cstrong\u003eHVAC high-limit control\u003c\/strong\u003e into the burner circuit maintains system integrity and complies with factory safety specifications for high-efficiency hydronic systems. When diagnosing \u003cstrong\u003eWeil McLain boiler troubleshooting\u003c\/strong\u003e issues, verifying the continuity and setpoints of the block switch ensures the \u003cstrong\u003eboiler safety controls\u003c\/strong\u003e are functioning at peak reliability.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecise Thermal Protection:\u003c\/strong\u003e Features a fixed 350°F open \/ 250°F close threshold for reliable overheat prevention.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication Specific:\u003c\/strong\u003e Optimized for seamless compatibility with \u003cstrong\u003eGV90+\u003c\/strong\u003e and \u003cstrong\u003eGV series gas boilers\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComplete Installation Kit:\u003c\/strong\u003e Includes the block switch and heavy-duty mounting bracket for secure placement.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Standards:\u003c\/strong\u003e Manufactured to original specifications to ensure proper electrical rating and mechanical fit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions:\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHow do I know if my block temperature switch is faulty?\u003c\/strong\u003e Technicians should check for continuity across the switch terminals during a call for heat; if the switch remains open at room temperature or fails to reset at 250°F, replacement is required.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWill this kit fix a flashing light lockout on my GV90+ boiler?\u003c\/strong\u003e A failing block switch is a frequent cause of safety lockouts; once the heat exchanger reaches the 350°F limit, the switch interrupts the control circuit until the system cools.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIs the mounting bracket mandatory for installation?\u003c\/strong\u003e Yes, the bracket ensures the sensor maintains the necessary surface tension against the block for accurate temperature detection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35645275532,"sku":"382-200-375","price":50.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_56aba74b-243a-4a25-9279-36e6b6245bbb.jpg?v=1755718700"},{"product_id":"weil-mclain-383-500-602-temp-sensor","title":"Weil McLain 383-500-602 Temp Sensor","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 383-500-602\u003c\/strong\u003e is a critical \u003cstrong\u003ereturn\/supply temperature sensor kit\u003c\/strong\u003e engineered for precise thermal monitoring within \u003cstrong\u003eWeil McLain Ultra\u003c\/strong\u003e and \u003cstrong\u003eSlimFit series boilers\u003c\/strong\u003e. This 12 Kohm \u003cstrong\u003eNTC thermistor\u003c\/strong\u003e assembly provides real-time data to the control board, allowing for accurate modulation and preventing short-cycling. As a dedicated \u003cstrong\u003eboiler replacement part\u003c\/strong\u003e, it ensures the system maintains the delta-T required for high-efficiency condensing operation. These sensors are designed for direct integration with the heat exchanger, measuring the fluid temperature as it enters and exits the block. For a service technician, replacing a fouled or drifting \u003cstrong\u003e383-500-602 sensor\u003c\/strong\u003e is standard procedure when troubleshooting E02 or E04 fault codes on \u003cstrong\u003eUltra Gas\u003c\/strong\u003e or \u003cstrong\u003eUltra Commercial\u003c\/strong\u003e units. This kit typically includes two sensors with white connectors, facilitating a simplified swap for both the supply and return lines to restore \u003cstrong\u003ehydronic heating system\u003c\/strong\u003e accuracy and peak performance.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOptimized System Efficiency:\u003c\/strong\u003e Precise 12 Kohm resistance ensures accurate temperature feedback for condensing boiler modulation.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBroad Compatibility:\u003c\/strong\u003e Fits a wide range of models including \u003cstrong\u003eWeil McLain Ultra Series 2, 3, and 4\u003c\/strong\u003e, and \u003cstrong\u003eSlimFit Series 550-750\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDirect OEM Replacement:\u003c\/strong\u003e Replaces factory-installed \u003cstrong\u003esupply and return sensors\u003c\/strong\u003e to clear sensor-related error codes.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Built to withstand the high-temperature environment of residential and commercial heat exchangers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eIs this a single sensor or a dual kit?\u003c\/strong\u003e\u003cbr\u003e\nThe \u003cstrong\u003e383-500-602\u003c\/strong\u003e is a kit that includes two (2) sensors, typically used for simultaneous replacement of the supply and return temperature monitoring points.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat are the symptoms of a failing Weil McLain temp sensor?\u003c\/strong\u003e\u003cbr\u003e\nCommon indicators include inconsistent water temperatures, the boiler failing to fire despite demand, or specific diagnostic codes on the U-Control display relating to sensor shorts or open circuits.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo I need to drain the boiler to replace these sensors?\u003c\/strong\u003e\u003cbr\u003e\nYes, because these sensors typically monitor the liquid temperature within the flow and return pipes or the heat exchanger manifold, the system should be isolated and partially drained to prevent leaks during the swap.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35645391948,"sku":"383-500-602","price":56.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_174359fa-f60d-4241-929b-5ff989622052.jpg?v=1755718700"},{"product_id":"weil-mclain-510-218-097-gauge","title":"Weil McLain 510-218-097 Gauge","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 510-218-097\u003c\/strong\u003e is a precision-engineered \u003cstrong\u003eOEM boiler gauge\u003c\/strong\u003e designed for mission-critical monitoring of hydronic heating systems. As a dual-purpose \u003cstrong\u003etemperature and pressure gauge\u003c\/strong\u003e, it provides real-time diagnostics essential for maintaining optimal boiler performance and identifying potential pressure drops or overheating before they cause system failure. This heavy-duty gauge features a \u003cstrong\u003e2-1\/2 inch dial\u003c\/strong\u003e with a high-contrast interface, allowing for quick visual verification of system status from a distance.\u003c\/p\u003e\n\n\u003cp\u003eBuilt for a direct fit on \u003cstrong\u003eWeil McLain EG, EGH, 68, and PFG boilers\u003c\/strong\u003e (sizes 85–125), this component utilizes a \u003cstrong\u003e1\/4\" NPT threaded connection\u003c\/strong\u003e with a \u003cstrong\u003elong shank back-mount\u003c\/strong\u003e configuration. The gauge supports a pressure range of \u003cstrong\u003e0–60 PSIG\u003c\/strong\u003e and covers standard hydronic temperature scales. Utilizing a genuine \u003cstrong\u003e510-218-097 replacement gauge\u003c\/strong\u003e ensures the sensing element is calibrated to factory specifications, maintaining the physical and operational integrity of the boiler’s safety monitoring loop.\u003c\/p\u003e\n\n\u003ch3\u003eKey Technical Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Function Monitoring:\u003c\/strong\u003e Provides simultaneous readings of system pressure and water temperature to streamline diagnostics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect OEM Fit:\u003c\/strong\u003e Specifically keyed for \u003cstrong\u003eWeil McLain 510-218-097\u003c\/strong\u003e applications, ensuring thread compatibility and correct probe depth.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Visibility Dial:\u003c\/strong\u003e The \u003cstrong\u003e2-1\/2\" display\u003c\/strong\u003e features defined increments for \u003cstrong\u003e0-60 PSIG\u003c\/strong\u003e, critical for identifying fluctuating system pressure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Infrastructure:\u003c\/strong\u003e The \u003cstrong\u003elong shank\u003c\/strong\u003e design and reinforced \u003cstrong\u003eback connection\u003c\/strong\u003e provide a secure seal and resist vibration during burner cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Calibration:\u003c\/strong\u003e Engineered for precision accuracy in residential and light commercial cast iron boiler configurations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs the 510-218-097 compatible with all Weil McLain systems?\u003c\/strong\u003e\u003cbr\u003e\nThis specific gauge is designed for \u003cstrong\u003eWeil-McLain EG, EGH, 68, and PFG Boilers\u003c\/strong\u003e in sizes 85 through 125. Always verify the specific port clearance and part number in your service manual.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat connection type does this gauge use?\u003c\/strong\u003e\u003cbr\u003e\nIt features a standard \u003cstrong\u003e1\/4\" NPT threaded back connection\u003c\/strong\u003e. It is recommended to use high-quality pipe sealant or PTFE tape to ensure a leak-proof seal during installation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this gauge require a separate well or immersion sleeve?\u003c\/strong\u003e\u003cbr\u003e\nThis \u003cstrong\u003ecombination gauge\u003c\/strong\u003e is designed for immersion into the boiler's tapping. Professionals should ensure the system is depressurized before removing the old gauge to prevent accidental discharge.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35645442444,"sku":"510-218-097","price":53.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Pic_325ae992-bdbe-49be-9680-baaf5f07c6f6.png?v=1767546764"},{"product_id":"weil-mclain-383-500-601-temperature-sensor","title":"Weil McLain 383-500-601 Temperature Sensor","description":"\u003cp\u003eAs a seasoned technician, you know that keeping a hydronic system in check starts with reliable data feeding into the control module. The \u003cstrong\u003eWeil McLain 383-500-601\u003c\/strong\u003e is a high-precision \u003cstrong\u003esystem temperature sensor\u003c\/strong\u003e designed as a direct replacement component for \u003cstrong\u003eUltra Gas\u003c\/strong\u003e and \u003cstrong\u003ecommercial boiler\u003c\/strong\u003e units. This 12k Ohm resistance NTC sensor provides the real-time thermal feedback required for proper mod-con operation, ensuring the \u003cstrong\u003eboiler control module\u003c\/strong\u003e can accurately adjust firing rates based on actual supply or return temperatures. While many residential setups utilize a single sensor, larger \u003cstrong\u003eUltra Gas 550\/750\u003c\/strong\u003e models often require two of these units to monitor both sides of the loop effectively. Built for durability in high-demand mechanical rooms, this sensor eliminates the erratic readings associated with aged or failing probes, preventing premature cycling and ensuring optimal energy management. For contractors performing a mid-season teardown or troubleshooting a \"no-heat\" call, having a genuine \u003cstrong\u003e383-500-601\u003c\/strong\u003e on the truck is essential for restoring system communication and efficiency.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSystem Compatibility:\u003c\/strong\u003e Engineered specifically for the Weil McLain Ultra Gas series and various commercial hydronic boilers.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOperational Efficiency:\u003c\/strong\u003e Delivers precise 12k Ohm resistance signals to the control board to optimize fuel consumption and modulation.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCritical Redundancy:\u003c\/strong\u003e Vital for \u003cstrong\u003eUltra Gas 550\/750\u003c\/strong\u003e boilers which utilize dual-sensor configurations for balanced thermal monitoring.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRugged Construction:\u003c\/strong\u003e Designed to withstand the thermal cycling and humidity levels found in industrial and residential boiler jackets.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions:\u003c\/strong\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDoes this sensor work for both supply and return lines?\u003c\/strong\u003e Yes, the 383-500-601 is used for both supply and return temperature sensing depending on how it is mapped to the boiler's control terminals.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWill this fix a lockout on an Ultra Gas boiler?\u003c\/strong\u003e If your system is throwing a sensor-related fault code or reporting \"Open Circuit\" for temperature, replacing the sensor often resolves the communication break between the loop and the control module.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIs this the same as an outdoor reset sensor?\u003c\/strong\u003e No, this is an internal system sensor; outdoor sensors use different resistance curves and housing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35645453388,"sku":"383-500-601","price":48.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/Pic_aaad91d0-2973-44e8-a900-64e65d625cfe.png?v=1755718698"},{"product_id":"weil-mclain-512-200-055-burner","title":"Weil McLain 512-200-055 Burner","description":"\u003cp\u003eWhen you're out in the field servicing a \u003cstrong\u003eWeil McLain LGB series\u003c\/strong\u003e commercial gas boiler, you need components that drop in without the headache of custom modifications. The \u003cstrong\u003eWeil McLain 512-200-055 Burner\u003c\/strong\u003e is a precision-engineered \u003cstrong\u003etubular steel burner\u003c\/strong\u003e specifically configured with an integrated \u003cstrong\u003epilot bracket\u003c\/strong\u003e to ensure stable ignition and consistent flame patterns across the heat exchanger. This \u003cstrong\u003eOEM burner assembly\u003c\/strong\u003e is the professional choice for maintaining the high-efficiency combustion standards of \u003cstrong\u003eLGB Series 1 and Series 2\u003c\/strong\u003e units, providing the structural integrity required for high-duty cycle commercial applications.\u003c\/p\u003e\n\u003cp\u003eReplacing rusted or warped burners with a genuine \u003cstrong\u003egas boiler replacement burner\u003c\/strong\u003e like the \u003cstrong\u003e512-200-055\u003c\/strong\u003e prevents common issues such as delayed ignition, secondary combustion noises, and uneven heat distribution. The inclusion of the \u003cstrong\u003epilot tab\u003c\/strong\u003e simplifies the alignment of your pilot burner, ensuring the flame carries over across the port openings effectively. As a veteran-spec part, it features 1\/2-inch NPT connections and is built to withstand the thermal stresses found in large-scale hydronic systems, keeping your clients' systems online and operating at peak performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLGB Series Compatibility:\u003c\/strong\u003e Purpose-built for \u003cstrong\u003eWeil McLain LGB series\u003c\/strong\u003e commercial boilers for a guaranteed fit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Pilot Alignment:\u003c\/strong\u003e The integrated \u003cstrong\u003epilot bracket\u003c\/strong\u003e ensures the pilot flame is perfectly positioned for reliable main burner ignition.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Tubular Steel:\u003c\/strong\u003e Constructed from high-grade steel to resist sagging and corrosion under intense heat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Combustion:\u003c\/strong\u003e Precision-drilled ports maintain an even flame, maximizing fuel efficiency and minimizing carbon buildup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Reliability:\u003c\/strong\u003e Genuine \u003cstrong\u003eWeil McLain 512-200-055\u003c\/strong\u003e part ensures the boiler remains within its original safety and performance specifications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this burner compatible with all Weil McLain boilers?\u003c\/strong\u003e\u003cbr\u003eNo, the \u003cstrong\u003e512-200-055\u003c\/strong\u003e is specifically engineered for the \u003cstrong\u003eLGB series\u003c\/strong\u003e (Series 1 and 2). Always verify your model number against the technical manual before installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this assembly include the pilot burner itself?\u003c\/strong\u003e\u003cbr\u003eThis product is the \u003cstrong\u003emain burner assembly with a pilot bracket\u003c\/strong\u003e. While it provides the mounting point for the pilot, the pilot burner assembly is typically ordered separately unless noted.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat causes these burners to fail prematurely?\u003c\/strong\u003e\u003cbr\u003eUsually, failure results from moisture in the combustion chamber or improper air-to-fuel ratios leading to \"pitting\" or port blockage. Replacing with a \u003cstrong\u003etubular steel burner\u003c\/strong\u003e restores the correct venturi action for a clean burn.\u003c\/p\u003e\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e\n\u003ch2\u003e\n\u003cspan style=\"color: red;\"\u003eThis item is not eligible for free shipping.\u003c\/span\u003e\u003cspan style=\"font-size: 10.0pt; font-family: 'Arial',sans-serif; color: red; background: white;\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35645462540,"sku":"512-200-055","price":54.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Image_3adad143-02fb-458a-81b3-d60db999499a.png?v=1792176903"},{"product_id":"weil-mclain-383-500-125-sensor","title":"Weil McLain 383-500-125 Sensor","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 383-500-125 Outdoor Temp Sensor\u003c\/strong\u003e is a critical OEM component designed to provide real-time ambient temperature data to the \u003cstrong\u003eWeil McLain Ultra Gas Boiler\u003c\/strong\u003e control module. By utilizing a 12k ohm thermistor encapsulated in a weather-resistant housing, this \u003cstrong\u003eoutdoor reset sensor\u003c\/strong\u003e allows the boiler to dynamically adjust its firing rate and supply water temperature based on external conditions. This process, known as outdoor reset logic, significantly increases system efficiency by preventing short-cycling and maintaining optimal condensing temperatures within the heat exchanger. For a proper install, contractors should mount the \u003cstrong\u003e383-500-125\u003c\/strong\u003e on the north side of the structure, at least 10 feet above grade, to avoid false readings from direct sunlight or mechanical exhaust. This \u003cstrong\u003ereplacement boiler sensor\u003c\/strong\u003e is compatible with the full range of Ultra series units and is essential for restoring high-efficiency performance after a sensor fault or open-circuit error. Integrating this \u003cstrong\u003eHVAC outdoor sensor\u003c\/strong\u003e ensures the control board can calculate the correct reset ratio for various heating loads.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003eEnsures accurate \u003cstrong\u003eoutdoor reset control\u003c\/strong\u003e for maximum fuel savings and thermal comfort.\u003c\/li\u003e\n  \u003cli\u003eDesigned for direct compatibility with \u003cstrong\u003eWeil McLain Ultra Gas Boilers\u003c\/strong\u003e and advanced control boards.\u003c\/li\u003e\n  \u003cli\u003eRuggedized housing protects the 12k ohm thermistor from moisture and environmental degradation.\u003c\/li\u003e\n  \u003cli\u003eReduces wear on the ignition system and heat exchanger by optimizing cycle times.\u003c\/li\u003e\n  \u003cli\u003eFacilitates precise temperature regulation across a wide ambient range of -40°F to 140°F.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWhere is the best location to mount the 383-500-125?\u003c\/strong\u003e It should be installed on an outside North-facing wall to prevent solar gain from skewing the temperature data. Avoid placement near dryer vents, doors, or windows.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHow can I verify if the sensor is defective?\u003c\/strong\u003e Technicians should use a multimeter to check the resistance across the sensor leads. At 77°F (25°C), the sensor should read approximately 10,000 to 12,000 ohms; significantly higher or lower readings typically indicate a failed component or wiring issue.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDoes this sensor come with the mounting hardware?\u003c\/strong\u003e The unit includes the sensor and the integrated mounting enclosure required for a standard exterior installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35645470860,"sku":"383-500-125","price":67.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_0b4aa857-51af-467e-9f88-e72824af8ab5.png?v=1755718697"},{"product_id":"weil-mclain-512-200-001-tube-burner","title":"Weil McLain 512-200-001 Tube Burner","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 512-200-001\u003c\/strong\u003e is a high-grade \u003cstrong\u003estainless steel tube burner\u003c\/strong\u003e engineered for precision combustion in \u003cstrong\u003eEG and EGH series boilers\u003c\/strong\u003e. Designed to integrate seamlessly with \u003cstrong\u003ePI (Intermittent Ignition) systems\u003c\/strong\u003e, this component features a pre-mounted \u003cstrong\u003epilot bracket\u003c\/strong\u003e to ensure consistent spark-to-burner alignment and stable flame propagation. For technicians servicing atmospheric gas manifolds, this \u003cstrong\u003eOEM replacement burner\u003c\/strong\u003e provides the thermal resistance required to prevent warping under high-fire conditions. Use this part to restore the factory-specified firing rate in \u003cstrong\u003eWeil McLain hydronic heating\u003c\/strong\u003e systems, particularly for \u003cstrong\u003eEG-75\u003c\/strong\u003e models and larger \u003cstrong\u003eEGH boilers\u003c\/strong\u003e. Proper seating within the burner tray slots is critical; ensure the tube openings face upward and the gas orifices are centered to maintain the correct air-to-fuel ratio across the \u003cstrong\u003eburner tube\u003c\/strong\u003e. This rugged stainless construction offers superior corrosion resistance compared to standard aluminized steel options, making it the professional choice for long-term boiler maintenance and peak thermal efficiency.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal Compatibility:\u003c\/strong\u003e Specifically designed for \u003cstrong\u003eWeil McLain EG and EGH\u003c\/strong\u003e boilers, including all \u003cstrong\u003ePI system\u003c\/strong\u003e sizes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecise Ignition:\u003c\/strong\u003e Integrated \u003cstrong\u003epilot bracket\u003c\/strong\u003e ensures the pilot flame is positioned correctly relative to the burner ports for reliable light-off.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Heat Durability:\u003c\/strong\u003e Constructed from \u003cstrong\u003estainless steel\u003c\/strong\u003e to withstand internal combustion temperatures and resist moisture-related oxidation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOEM Standards:\u003c\/strong\u003e Genuine \u003cstrong\u003eWeil McLain replacement part\u003c\/strong\u003e ensures exact fitment with existing burner pan side rails and manifolds.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eIs this burner compatible with Standing Pilot (SPN) systems?\u003c\/strong\u003e\u003cbr\u003e\nWhile this part is optimized for Intermittent Ignition (PI) and SPL systems, it is only compatible with SPN configurations on specific models like the EG-75. Always verify your specific boiler series and ignition type before installation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this include the pilot burner assembly?\u003c\/strong\u003e\u003cbr\u003e\nNo, the 512-200-001 includes the \u003cstrong\u003eburner tube\u003c\/strong\u003e and the attached \u003cstrong\u003epilot bracket\u003c\/strong\u003e only. The pilot burner, orifice, and pilot tubing must be ordered separately if a full ignition overhaul is required.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAre the openings supposed to face up or down?\u003c\/strong\u003e\u003cbr\u003e\nFor correct combustion, the tube must be seated in the burner tray with the discharge openings facing directly upward toward the heat exchanger sections.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35645520908,"sku":"512-200-001","price":56.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_3da326b6-8683-4e78-88b1-7ea2c7b59fd2.jpg?v=1755718696"},{"product_id":"weil-mclain-511-330-089-sensor-clamp","title":"Weil McLain 511-330-089 Sensor \u0026 Clamp","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 511-330-089 Sensor \u0026amp; Clamp\u003c\/strong\u003e is a critical \u003cstrong\u003eOEM replacement water temperature sensor\u003c\/strong\u003e engineered for precise thermal monitoring in high-efficiency hydronic systems. This \u003cstrong\u003ethermistor-style temperature sensor\u003c\/strong\u003e is primarily utilized as a \u003cstrong\u003ewater return sensor\u003c\/strong\u003e or \u003cstrong\u003einlet sensor\u003c\/strong\u003e for \u003cstrong\u003eWeil McLain GV series boilers\u003c\/strong\u003e, including the \u003cstrong\u003eGV90\u003c\/strong\u003e, \u003cstrong\u003eGV90+\u003c\/strong\u003e, and \u003cstrong\u003eGV-3 Trim\u003c\/strong\u003e models. By delivering accurate resistance-based signals to the \u003cstrong\u003eIntegrated Boiler Control (IBC)\u003c\/strong\u003e, this component ensures the system maintains optimal firing rates and prevents rapid short cycling or overheat conditions. The assembly includes a robust \u003cstrong\u003emounting clamp\u003c\/strong\u003e and \u003cstrong\u003e12-inch electrical leads\u003c\/strong\u003e for a secure, direct-mount installation to the return piping, facilitating consistent heat transfer and responsive data logging for the control logic. Utilizing genuine \u003cstrong\u003eWeil McLain boiler parts\u003c\/strong\u003e like this \u003cstrong\u003e511-330-089\u003c\/strong\u003e kit maintains the integrity of the original design parameters and provides the reliable performance required for demanding residential heating applications.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecise Thermal Feedback:\u003c\/strong\u003e Engineered to provide the high-accuracy resistance data required by the \u003cstrong\u003eboiler control module\u003c\/strong\u003e for efficient burner modulation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect-Mount Design:\u003c\/strong\u003e The included stainless steel clamp ensures a tight, high-conductivity connection to the piping for immediate temperature response.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGV Series Compatibility:\u003c\/strong\u003e Purpose-built for \u003cstrong\u003eWeil McLain GV90\u003c\/strong\u003e, \u003cstrong\u003eGV90+\u003c\/strong\u003e, and \u003cstrong\u003eGV-3\u003c\/strong\u003e boilers, ensuring seamless electrical and mechanical integration.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComplete Solution:\u003c\/strong\u003e Features \u003cstrong\u003e12-inch lead wires\u003c\/strong\u003e to streamline the connection process to the wiring harness without the need for additional splicing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions:\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHow do I know if my sensor is failing?\u003c\/strong\u003e Symptoms often include fluctuating water temperatures, frequent error codes related to sensor limit faults, or the boiler staying \"stuck\" in a specific firing state.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIs this sensor compatible with all Weil McLain models?\u003c\/strong\u003e No, this is a specific model-dependent part. While common on \u003cstrong\u003eGV series boilers\u003c\/strong\u003e, you must verify against your specific serial number and parts list.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDoes this include the clamp?\u003c\/strong\u003e Yes, the \u003cstrong\u003e511-330-089\u003c\/strong\u003e kit is a combined \u003cstrong\u003esensor and clamp\u003c\/strong\u003e assembly for immediate installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35645582732,"sku":"511-330-089","price":61.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_f0895c0f-9027-41ad-aec5-7d6abbf1e78d.jpg?v=1755718695"},{"product_id":"weil-mclain-511-842-370-transformer","title":"Weil McLain 511-842-370 Transformer","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 511-842-370 Transformer\u003c\/strong\u003e is a critical \u003cstrong\u003eOEM replacement part\u003c\/strong\u003e engineered for high-performance voltage regulation in residential and commercial boilers. As a \u003cstrong\u003estep-down control transformer\u003c\/strong\u003e, this component is designed to convert \u003cstrong\u003e120V primary voltage\u003c\/strong\u003e to a stable \u003cstrong\u003e24V secondary output\u003c\/strong\u003e, providing the necessary 40VA power rating to drive ignition modules, gas valves, and integrated boiler control systems. This \u003cstrong\u003eHVAC control transformer\u003c\/strong\u003e is a direct replacement for the Honeywell AT140B1297 and is vital for maintaining the electrical integrity of your heating system's low-voltage circuit.\u003c\/p\u003e\n\n\u003cp\u003eFor field technicians, ensure that the \u003cstrong\u003eWeil McLain 511-842-370\u003c\/strong\u003e is utilized specifically within compatible hydronic systems to prevent control board failure. This \u003cstrong\u003e40VA 24V boiler transformer\u003c\/strong\u003e features a foot-mount configuration for secure installation within the cabinet. It is rigorously tested for compatibility with \u003cstrong\u003eWeil McLain boiler models\u003c\/strong\u003e including the AHE, GV (Series 1-4), GV90+, HE II, CGT, CGS, CGi, and CGA series. Reliability in the \u003cstrong\u003e24VAC control circuit\u003c\/strong\u003e is paramount for avoiding nuisance lockouts and ensuring consistent sequence of operation.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect OEM Compatibility:\u003c\/strong\u003e Verified for use in Weil McLain GV, CGi, and CGA series boilers, ensuring seamless integration with existing wiring harnesses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Power Delivery:\u003c\/strong\u003e Provides a consistent \u003cstrong\u003e40VA power rating\u003c\/strong\u003e, sufficient for driving multiple 24V loads without secondary voltage sag.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRugged Foot-Mount Design:\u003c\/strong\u003e Simplifies replacement tasks by matching the standard mounting footprint of factory-installed units.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandardized Electrical Specs:\u003c\/strong\u003e Features a \u003cstrong\u003e120V primary\u003c\/strong\u003e and \u003cstrong\u003e24V secondary\u003c\/strong\u003e configuration to meet the specific demands of modern HVAC control logic.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions:\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eWhat boiler models use the Weil McLain 511-842-370?\u003c\/strong\u003e\u003cbr\u003e\nThis transformer is compatible with a wide range of units, including the Weil McLain GV90+, GV Series 1-4, CGi, CGa, and HE II boilers.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan this transformer replace a 20VA or 30VA unit?\u003c\/strong\u003e\u003cbr\u003e\nYes, the 40VA rating provides a higher power capacity, making it a robust upgrade for systems originally equipped with lower VA rated 24V transformers.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs the 511-842-370 a direct swap for the Honeywell AT140B1297?\u003c\/strong\u003e\u003cbr\u003e\nCorrect. This part serves as the official Weil McLain replacement for the AT140B1297, maintaining identical electrical specifications and mounting points.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35645625484,"sku":"511-842-370","price":58.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/Pic_0fb39eb4-fd6e-4e48-83f0-88dc00012562.jpg?v=1755718694"},{"product_id":"weil-mclain-591-391-795-wiring-harness","title":"Weil McLain 591-391-795 Wiring Harness","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 591-391-795 Wiring Harness\u003c\/strong\u003e is a specialized OEM replacement component engineered for high-efficiency boiler systems. This harness serves as the primary electrical interface between the \u003cstrong\u003eautomatic vent damper motor\u003c\/strong\u003e and the \u003cstrong\u003eignition-sensing control module\u003c\/strong\u003e. For service contractors, this part is critical for ensuring the safe sequencing of the combustion process, specifically preventing the burner from firing until the damper has reached its fully open position. Built with high-grade insulation and equipped with factory-standard \u003cstrong\u003eMolex connectors\u003c\/strong\u003e, this harness ensures an error-resistant, plug-and-play installation for technicians managing field repairs. It is specifically designed for \u003cstrong\u003eWeil McLain CG, CGa, CGx, EG, EGH, and PFG series boilers\u003c\/strong\u003e. Utilizing this genuine \u003cstrong\u003eHVAC wire assembly\u003c\/strong\u003e ensures signal integrity between the safety controls and the mechanical damper operator, maintaining the system's operational sequence and preventing premature control failure caused by high-resistance connections common with aftermarket wiring.\u003c\/p\u003e\n\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrecision Compatibility:\u003c\/strong\u003e Designed specifically for \u003cstrong\u003eWeil McLain boiler controls\u003c\/strong\u003e including CGa and EG series units.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIndustrial Connector Quality:\u003c\/strong\u003e Features \u003cstrong\u003eMolex plugs\u003c\/strong\u003e to ensure a secure, vibration-resistant electrical connection.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEnhanced System Safety:\u003c\/strong\u003e Facilitates the essential communication link for \u003cstrong\u003edamper motor operation\u003c\/strong\u003e and ignition sensing.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eField Reliability:\u003c\/strong\u003e Durable construction resists thermal degradation within the boiler cabinet, ensuring long-term conductivity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhich boiler models are compatible with this wiring harness?\u003c\/strong\u003e\u003cbr\u003e\nThis harness is the correct replacement for \u003cstrong\u003eWeil McLain gas-fired boilers\u003c\/strong\u003e including CGa, CGx, EG, and EGH models that utilize an automatic vent damper for efficiency.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the primary function of the 591-391-795 harness?\u003c\/strong\u003e\u003cbr\u003e\nIt connects the \u003cstrong\u003event damper motor operator\u003c\/strong\u003e to the boiler's \u003cstrong\u003eignition control module\u003c\/strong\u003e, allowing the safety circuit to verify the damper position before initiating combustion.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this harness include the Molex connectors?\u003c\/strong\u003e\u003cbr\u003e\nYes, this is a complete \u003cstrong\u003eOEM wiring assembly\u003c\/strong\u003e featuring pre-terminated Molex connectors for immediate integration into the existing electrical system.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35645686412,"sku":"591-391-795","price":63.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/Pic_a88dd582-68aa-4c21-8c81-248984b3d39b.jpg?v=1755718694"},{"product_id":"weil-mclain-512-200-002-burner","title":"Weil McLain 512-200-002 Burner","description":"\u003cp\u003eTo maintain peak combustion efficiency and reliable ignition in residential systems, technicians specify the \u003cstrong\u003eWeil McLain 512-200-002 Burner\u003c\/strong\u003e. This \u003cstrong\u003estainless steel burner tube\u003c\/strong\u003e is a critical direct replacement part designed specifically for \u003cstrong\u003eWeil McLain SPN systems\u003c\/strong\u003e, including the \u003cstrong\u003eEG series boilers\u003c\/strong\u003e and \u003cstrong\u003eP-EG-30-65 series boilers\u003c\/strong\u003e. Engineered with a robust \u003cstrong\u003epilot bracket\u003c\/strong\u003e, this assembly ensures the precise positioning of the pilot flame relative to the main burner ports, preventing delayed ignition and nuisance lockouts in \u003cstrong\u003estanding pilot boilers\u003c\/strong\u003e. The 304-grade \u003cstrong\u003estainless steel construction\u003c\/strong\u003e provides superior resistance to thermal fatigue and corrosive flue gas condensates compared to standard cold-rolled steel. For contractors performing a clean-and-check or full combustion overhaul, utilizing this \u003cstrong\u003eOEM boiler burner\u003c\/strong\u003e is the only way to verify that the \u003cstrong\u003eBTU input\u003c\/strong\u003e and flame characteristics remain within the original design parameters of the \u003cstrong\u003eheat exchanger\u003c\/strong\u003e. This part ensures consistent flame propagation across the entire tube length for optimal heat transfer.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication Specific:\u003c\/strong\u003e Engineered exclusively for \u003cstrong\u003eEG-30 through EG-65\u003c\/strong\u003e and \u003cstrong\u003eP-EG series\u003c\/strong\u003e boilers to ensure a perfect manifold fit.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnhanced Durability:\u003c\/strong\u003e The \u003cstrong\u003ecorrosion-resistant stainless steel\u003c\/strong\u003e material prevents port blockage and scaling over years of high-temperature operation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated Pilot Bracket:\u003c\/strong\u003e Provides a rigid mounting point for the \u003cstrong\u003epilot assembly\u003c\/strong\u003e, ensuring stable ignition even during high-draft conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision Ports:\u003c\/strong\u003e Factory-drilled ports provide a stable, blue flame pattern for maximum \u003cstrong\u003eAFUE rating\u003c\/strong\u003e retention.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions:\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCan this burner be used with Propane (LP) gas?\u003c\/strong\u003e Yes, this steel tube burner is compatible with both Natural Gas and Propane, provided the correctly sized \u003cstrong\u003eburner orifice\u003c\/strong\u003e is installed in the manifold.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDoes this include the pilot assembly?\u003c\/strong\u003e This part number is for the \u003cstrong\u003eburner tube with pilot bracket\u003c\/strong\u003e; the pilot burner, thermocouple, or spark igniter must be ordered separately if required.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHow do I know if my burner needs replacement?\u003c\/strong\u003e Look for signs of \"lazy\" orange flames, heavy rust flaking at the base, or enlarged ports that cause localized overheating on the \u003cstrong\u003esection assembly\u003c\/strong\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35645701388,"sku":"512-200-002","price":64.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_227c728a-75c5-47c5-9e89-e39366e18778.png?v=1755718693"},{"product_id":"weil-mclain-381-354-527-kit","title":"Weil McLain 381-354-527 Replacement Kit","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 381-354-527 Section Replacement Kit\u003c\/strong\u003e is a critical \u003cstrong\u003eOEM boiler part\u003c\/strong\u003e designed for technicians performing \u003cstrong\u003ecast iron boiler repair\u003c\/strong\u003e on specific gas-fired residential units. This technical kit provides the essential \u003cstrong\u003eseals and sealant\u003c\/strong\u003e required to rebuild a single joint between \u003cstrong\u003eboiler sections\u003c\/strong\u003e, ensuring a gas-tight and water-tight pressure vessel assembly. Engineered for compatibility with \u003cstrong\u003eWeil McLain CGa\u003c\/strong\u003e, CGi, CGs, and GV series boilers, this kit addresses common combustion chamber leaks and heat exchanger failures. Using genuine \u003cstrong\u003eWeil McLain replacement parts\u003c\/strong\u003e maintains the original equipment’s efficiency ratings and structural integrity. For veteran contractors, this kit simplifies the teardown and reassembly of the heat exchanger block by providing high-temperature retort cement and specialized square-cut seals that withstand rigorous thermal cycling. Proper installation of this \u003cstrong\u003eboiler section kit\u003c\/strong\u003e prevents hazardous flue gas bypass and costly water damage to the \u003cstrong\u003ehydronic heating system\u003c\/strong\u003e components.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Series Compatibility:\u003c\/strong\u003e Precision-fit for Weil McLain CG, CGa, CGi, CGs, CGx, and CGT gas boilers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Joint Solution:\u003c\/strong\u003e Includes high-grade \u003cstrong\u003eboiler seals and sealant\u003c\/strong\u003e to serviced one full block connection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Engineering:\u003c\/strong\u003e Ensures factory-standard compression and thermal expansion tolerances are met during reassembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced Downtime:\u003c\/strong\u003e Eliminates the need for sourcing individual gaskets or generic sealants during critical heating season repairs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliability:\u003c\/strong\u003e Heavy-duty materials designed specifically for the high-temperature environment of cast iron heat exchangers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions:\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this kit include more than one seal?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 381-354-527 kit is designed to provide all the necessary sealing components for one (1) joint between two sections. If your repair involves multiple sections (e.g., rebuilding a 4-section block), you will need to purchase a kit for each joint encountered.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhich boiler models is this kit compatible with?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis kit is primarily used for atmospheric and induced draft gas boilers, including the Gold CGa, CGi Series, and various legacy CG and GV models. Always verify your specific boiler serial number and section assembly drawing before proceeding.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I use standard RTV silicone instead of the included sealant?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. This kit includes specialized retort cement and square-cut seals rated for the high-temperature and chemical conditions within the boiler sections. Using non-specified sealants can cause premature failure and combustion leaks.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":35645718412,"sku":"381-354-527","price":63.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/products\/1_b752ad83-407a-4ccd-842c-2becd077b1b5.jpg?v=1755718692"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/collections\/Pic_cb0f40f3-b872-4d22-9b15-2882b0da8220.png?v=1743446249","url":"https:\/\/www.gsistore.com\/en-ca\/collections\/weil-mclain.oembed?page=11","provider":"GSIstore","version":"1.0","type":"link"}