{"product_id":"weil-mclain-511-044-278","title":"Weil McLain 511-044-278 Gas Valve","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 511-044-278 LP (Propane) Gas Valve\u003c\/strong\u003e is a \u003cstrong\u003e3\/4 in. x 1 in. 24V combination gas valve\u003c\/strong\u003e for a \u003cstrong\u003espark pilot\u003c\/strong\u003e (\u003cstrong\u003eintermittent pilot\u003c\/strong\u003e) ignition system. The valve is catalogued as an \u003cstrong\u003eLP (propane)\u003c\/strong\u003e valve, so it is built for \u003cstrong\u003epropane\u003c\/strong\u003e service and not \u003cstrong\u003enatural gas\u003c\/strong\u003e. A \u003cstrong\u003ecombination gas valve\u003c\/strong\u003e puts the \u003cstrong\u003emanual shutoff\u003c\/strong\u003e, the \u003cstrong\u003eredundant automatic safety valves\u003c\/strong\u003e and the \u003cstrong\u003epressure regulator\u003c\/strong\u003e into one body, which makes it the central safety and \u003cstrong\u003efuel\u003c\/strong\u003e control on a \u003cstrong\u003egas-fired boiler\u003c\/strong\u003e or heater.\u003c\/p\u003e\n\n\u003cp\u003eOn a \u003cstrong\u003espark pilot\u003c\/strong\u003e system, the \u003cstrong\u003e24V\u003c\/strong\u003e control calls for heat, the pilot is lit by a \u003cstrong\u003espark\u003c\/strong\u003e, and only after the flame is proven does the main valve open. The two \u003cstrong\u003eautomatic valves\u003c\/strong\u003e in series give a \u003cstrong\u003efail-safe shutoff\u003c\/strong\u003e if one of them is held open by debris or fails to seat. Propane appliances run at a higher \u003cstrong\u003emanifold pressure\u003c\/strong\u003e than \u003cstrong\u003enatural gas\u003c\/strong\u003e, so the regulator in an \u003cstrong\u003eLP\u003c\/strong\u003e valve is set for that \u003cstrong\u003efuel\u003c\/strong\u003e. That is why you must match the valve to the \u003cstrong\u003efuel\u003c\/strong\u003e: do not swap a \u003cstrong\u003enatural gas\u003c\/strong\u003e valve onto a \u003cstrong\u003epropane\u003c\/strong\u003e appliance, or the reverse.\u003c\/p\u003e\n\n\u003cp\u003eBefore replacing a \u003cstrong\u003egas valve\u003c\/strong\u003e, confirm the \u003cstrong\u003efuel\u003c\/strong\u003e, the \u003cstrong\u003e3\/4 in. x 1 in.\u003c\/strong\u003e connection sizes, the \u003cstrong\u003e24V\u003c\/strong\u003e coil, the \u003cstrong\u003espark pilot\u003c\/strong\u003e ignition type and the \u003cstrong\u003emanifold pressure\u003c\/strong\u003e on the \u003cstrong\u003erating plate\u003c\/strong\u003e, and match them to the original. Shut off the gas supply at the manual valve, disconnect power, mark each wire, and use \u003cstrong\u003epipe dope\u003c\/strong\u003e or tape approved for gas on the male threads only. After installation, \u003cstrong\u003eleak-test\u003c\/strong\u003e every joint with an approved solution, verify the pilot and main burner light off, and check the \u003cstrong\u003emanifold pressure\u003c\/strong\u003e with a \u003cstrong\u003emanometer\u003c\/strong\u003e against the boiler data plate. Gas valves are safety controls, and a leak test before you leave is not optional. Confirm compatibility with your boiler before you order.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBuilt for Propane:\u003c\/strong\u003e Catalogued as an \u003cstrong\u003eLP (propane)\u003c\/strong\u003e valve, so the \u003cstrong\u003efuel\u003c\/strong\u003e match is clear.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSpark Pilot Ignition:\u003c\/strong\u003e Made for \u003cstrong\u003espark pilot\u003c\/strong\u003e (\u003cstrong\u003eintermittent pilot\u003c\/strong\u003e) systems, with the pilot lit by a \u003cstrong\u003espark\u003c\/strong\u003e and proven before the main valve opens.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e3\/4 In. x 1 In. Connections:\u003c\/strong\u003e The \u003cstrong\u003e3\/4 in. x 1 in.\u003c\/strong\u003e sizes let you compare against the existing gas piping.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCombination Valve Design:\u003c\/strong\u003e Manual shutoff, \u003cstrong\u003eredundant automatic valves\u003c\/strong\u003e and a \u003cstrong\u003epressure regulator\u003c\/strong\u003e in one body.\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\u003eIs the 511-044-278 propane or natural gas?\u003c\/strong\u003e It is catalogued as an \u003cstrong\u003eLP (propane)\u003c\/strong\u003e valve.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWhat ignition type is it for?\u003c\/strong\u003e Spark pilot (\u003cstrong\u003eintermittent pilot\u003c\/strong\u003e) ignition.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWhat should I check before I replace the valve?\u003c\/strong\u003e Match the \u003cstrong\u003efuel\u003c\/strong\u003e, the connection sizes, the voltage, the ignition type and the \u003cstrong\u003emanifold pressure\u003c\/strong\u003e from the \u003cstrong\u003erating plate\u003c\/strong\u003e. Leak-test every joint after installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\nDisclaimer: 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.","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":68025748783282,"sku":"511-044-278","price":655.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/ac-parts-1000x1000_d8f6c0df-eeb5-4a7f-8ee2-4f92681ea310.webp?v=1755632728","url":"https:\/\/www.gsistore.com\/products\/weil-mclain-511-044-278","provider":"GSIstore","version":"1.0","type":"link"}