{"product_id":"weil-mclain-381-800-826","title":"Weil McLain 381-800-826 Gas Train","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 381-800-826 Gas Train\u003c\/strong\u003e is the factory \u003cstrong\u003egas control assembly\u003c\/strong\u003e for the \u003cstrong\u003eWeil-McLain EG-75 PIDN\u003c\/strong\u003e gas-fired cast iron boiler. It is the group of parts that meters fuel to the burner and lights it. The product photo shows a \u003cstrong\u003egas valve\u003c\/strong\u003e with \u003cstrong\u003ePV\u003c\/strong\u003e and \u003cstrong\u003eMV\u003c\/strong\u003e terminal markings, a long slotted \u003cstrong\u003eburner tube\u003c\/strong\u003e with its bracket, the \u003cstrong\u003epilot and ignition assembly\u003c\/strong\u003e with ceramic-insulated electrodes and leads, \u003cstrong\u003ethermal switches\u003c\/strong\u003e, and a pail of \u003cstrong\u003enon-asbestos furnace and retort cement\u003c\/strong\u003e. Weil-McLain lists the gas control for the \u003cstrong\u003eEG-65 PIDN\u003c\/strong\u003e separately as \u003cstrong\u003e381-800-825\u003c\/strong\u003e, so the number you order is set by boiler size: the \u003cstrong\u003e381-800-826\u003c\/strong\u003e is the \u003cstrong\u003eEG-75\u003c\/strong\u003e assembly.\u003c\/p\u003e\n\n\u003cp\u003eOn a gas boiler with \u003cstrong\u003eintermittent pilot ignition\u003c\/strong\u003e, the \u003cstrong\u003eignition control module\u003c\/strong\u003e runs the sequence. On a call for heat it opens the \u003cstrong\u003epilot valve (PV)\u003c\/strong\u003e and fires the \u003cstrong\u003espark electrode\u003c\/strong\u003e, proves the pilot flame through the \u003cstrong\u003eflame sensor\u003c\/strong\u003e, and only then energizes the \u003cstrong\u003emain valve (MV)\u003c\/strong\u003e so gas flows through the \u003cstrong\u003emanifold\u003c\/strong\u003e and \u003cstrong\u003emain burner orifice\u003c\/strong\u003e into the \u003cstrong\u003eburner tube\u003c\/strong\u003e. The valve's built-in \u003cstrong\u003eregulator\u003c\/strong\u003e holds \u003cstrong\u003emanifold pressure\u003c\/strong\u003e steady while the burner runs. For the EG-75, Weil-McLain's series 6 parts list shows the related burner components as separate numbers: \u003cstrong\u003emanifold 591-125-542\u003c\/strong\u003e, the \u003cstrong\u003e2.30 mm natural gas main burner orifice 560-528-975\u003c\/strong\u003e, the \u003cstrong\u003estainless burner tube 512-200-000\u003c\/strong\u003e (or \u003cstrong\u003e512-200-001\u003c\/strong\u003e with the pilot bracket), the \u003cstrong\u003espill switch 510-300-013\u003c\/strong\u003e, and the \u003cstrong\u003ebase front access panel with flame rollout switch bracket 451-800-044\u003c\/strong\u003e. Other numbers in the same family include the \u003cstrong\u003egas control valve 381-800-823\u003c\/strong\u003e and the \u003cstrong\u003eEG-75 base assembly 381-800-834\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eBefore condemning the gas train, confirm it is the actual fault. A pilot that will not light or hold, a main burner that never opens, \u003cstrong\u003edelayed ignition\u003c\/strong\u003e, a \u003cstrong\u003eyellow or lifting flame\u003c\/strong\u003e, or a gas odor at the valve all point at it. A no-heat call also comes from \u003cstrong\u003emissing 24-volt control power\u003c\/strong\u003e, a tripped \u003cstrong\u003elimit or spill switch\u003c\/strong\u003e, a blocked flue, low \u003cstrong\u003egas supply pressure\u003c\/strong\u003e, a dirty \u003cstrong\u003eflame sensor\u003c\/strong\u003e, or a failed \u003cstrong\u003eignition control module\u003c\/strong\u003e, and those are quicker to rule out first. When you replace the assembly, shut off the gas and the power, move wiring one lead at a time against the wiring diagram, then \u003cstrong\u003eleak-test every gas connection\u003c\/strong\u003e with an approved solution, check \u003cstrong\u003emanifold pressure\u003c\/strong\u003e and flame appearance, and run the boiler through a full cycle. Confirm that the \u003cstrong\u003egas type\u003c\/strong\u003e on the rating plate matches the burner components, and leave gas work to a licensed technician.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFactory Assembly For The EG-75 PIDN:\u003c\/strong\u003e Listed by Weil-McLain for the \u003cstrong\u003eEG-75\u003c\/strong\u003e boiler, so the valve and burner hardware match the unit it was built to serve.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eValve, Burner, And Ignition Hardware Together:\u003c\/strong\u003e The assembly pictured brings the \u003cstrong\u003egas valve\u003c\/strong\u003e, \u003cstrong\u003eburner tube\u003c\/strong\u003e, \u003cstrong\u003epilot and ignition parts\u003c\/strong\u003e, and \u003cstrong\u003ethermal switches\u003c\/strong\u003e into one order instead of several.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRight Number For Your Boiler Size:\u003c\/strong\u003e The \u003cstrong\u003eEG-65 PIDN\u003c\/strong\u003e uses \u003cstrong\u003e381-800-825\u003c\/strong\u003e and the \u003cstrong\u003eEG-75\u003c\/strong\u003e uses \u003cstrong\u003e381-800-826\u003c\/strong\u003e, so the size on the rating plate decides the part.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOEM-Specified Parts:\u003c\/strong\u003e Built to Weil-McLain's own specification rather than a universal gas valve kit that has to be adapted to the boiler.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWhat boiler does it fit?\u003c\/strong\u003e The \u003cstrong\u003eWeil-McLain EG-75 PIDN\u003c\/strong\u003e gas boiler. Match the model, series, and gas type on the rating plate before ordering, because the same family carries different numbers for the other sizes.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWhat is in the assembly?\u003c\/strong\u003e The product photo shows the \u003cstrong\u003egas valve\u003c\/strong\u003e, \u003cstrong\u003eburner tube\u003c\/strong\u003e, \u003cstrong\u003epilot and ignition hardware\u003c\/strong\u003e, \u003cstrong\u003ethermal switches\u003c\/strong\u003e, and furnace cement. Contact our team to confirm the exact contents against your boiler's parts breakdown.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHow do I know the gas train is the problem?\u003c\/strong\u003e Check \u003cstrong\u003econtrol power\u003c\/strong\u003e, \u003cstrong\u003egas supply pressure\u003c\/strong\u003e, the \u003cstrong\u003eflame sensor\u003c\/strong\u003e, and the \u003cstrong\u003eignition control module\u003c\/strong\u003e first; if the pilot lights but the main valve will not open or the flame is poor, the gas train is the next suspect.\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":67694982430898,"sku":"381-800-826","price":1098.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/381-800-826.jpg?v=1791918692","url":"https:\/\/www.gsistore.com\/en-ca\/products\/weil-mclain-381-800-826","provider":"GSIstore","version":"1.0","type":"link"}