{"product_id":"weil-mclain-511-246-345","title":"Weil McLain 511-246-345 Gas Valve","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 511-246-345 Pilot Line Manual Shut-Off Gas Valve\u003c\/strong\u003e is the factory \u003cstrong\u003e1\/4-inch NPT male x 1\/4-inch NPT female\u003c\/strong\u003e manual valve for the \u003cstrong\u003epilot gas line\u003c\/strong\u003e on \u003cstrong\u003eWeil-McLain LGB gas boilers\u003c\/strong\u003e. Weil-McLain’s parts catalog lists \u003cstrong\u003e511-246-345\u003c\/strong\u003e under the \u003cstrong\u003eCSD-1 common parts\u003c\/strong\u003e for the \u003cstrong\u003eLGB-5\u003c\/strong\u003e, described as a \u003cstrong\u003epilot line manual shut-off gas valve\u003c\/strong\u003e with \u003cstrong\u003e1\/4-inch NPT male\u003c\/strong\u003e and \u003cstrong\u003e1\/4-inch NPT female\u003c\/strong\u003e pilot tubing connections. Its \u003cstrong\u003emale x female\u003c\/strong\u003e body threads inline into the \u003cstrong\u003e1\/4-inch pilot gas line\u003c\/strong\u003e feeding the \u003cstrong\u003epilot burner\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003epilot line\u003c\/strong\u003e is the small gas branch that feeds the \u003cstrong\u003epilot burner\u003c\/strong\u003e, the flame that lights the main burner. A \u003cstrong\u003emanual pilot shut-off valve\u003c\/strong\u003e lets a technician \u003cstrong\u003eisolate pilot gas\u003c\/strong\u003e without touching the \u003cstrong\u003emain shut-off valve\u003c\/strong\u003e, and it gives \u003cstrong\u003eCSD-1 inspection and leak-test procedures\u003c\/strong\u003e a positive stop in the pilot circuit. Weil-McLain’s \u003cstrong\u003eLGB CSD-1 control supplement\u003c\/strong\u003e has the installer \u003cstrong\u003eclose the pilot shut-off valve\u003c\/strong\u003e during the lighting sequence and \u003cstrong\u003ereopen it together with the main valve\u003c\/strong\u003e, and it lists a sister pilot shut-off valve, \u003cstrong\u003e511-246-340\u003c\/strong\u003e (a \u003cstrong\u003eKinco-Balon P2R\u003c\/strong\u003e), that also serves as a \u003cstrong\u003eleak test valve\u003c\/strong\u003e. A direct cross-reference for this valve is the \u003cstrong\u003eApollo\/Conbraco 94MBV02\u003c\/strong\u003e (\u003cstrong\u003e94-MBV-02\u003c\/strong\u003e), a \u003cstrong\u003eforged-brass, full-port, 1\/4-inch female x male NPT mini ball valve\u003c\/strong\u003e rated \u003cstrong\u003e600 psi at 100°F\u003c\/strong\u003e and listed to \u003cstrong\u003eANSI Z21.15\/CSA 9.1\u003c\/strong\u003e and \u003cstrong\u003eASME B16.44\u003c\/strong\u003e for gas service.\u003c\/p\u003e\n\u003cp\u003eReplace the valve when the \u003cstrong\u003ehandle is stiff or seized\u003c\/strong\u003e, the \u003cstrong\u003estem packing weeps\u003c\/strong\u003e, or the pilot circuit \u003cstrong\u003ecannot be shut off positively\u003c\/strong\u003e. Close the \u003cstrong\u003emain manual shut-off valve\u003c\/strong\u003e and the \u003cstrong\u003epilot valve\u003c\/strong\u003e, disconnect the \u003cstrong\u003epilot tubing\u003c\/strong\u003e, and unthread the old valve. Keep the \u003cstrong\u003emale x female orientation\u003c\/strong\u003e the same, use \u003cstrong\u003egas-rated thread sealant\u003c\/strong\u003e on the \u003cstrong\u003eNPT threads\u003c\/strong\u003e, and remake the \u003cstrong\u003etubing connection\u003c\/strong\u003e carefully so the flare or compression fitting seats square. \u003cstrong\u003eLeak-test every joint\u003c\/strong\u003e with approved solution before you relight, and follow the \u003cstrong\u003eCSD-1 operating instructions\u003c\/strong\u003e for your boiler. Gas work belongs to a \u003cstrong\u003equalified technician\u003c\/strong\u003e following local code.\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 Pilot Line Valve:\u003c\/strong\u003e The \u003cstrong\u003eOEM pilot shut-off\u003c\/strong\u003e that Weil-McLain lists for the \u003cstrong\u003eLGB CSD-1 gas train\u003c\/strong\u003e, so the pilot circuit stays as designed.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePositive Pilot Isolation:\u003c\/strong\u003e \u003cstrong\u003eManual quarter-turn shutoff\u003c\/strong\u003e of \u003cstrong\u003epilot gas\u003c\/strong\u003e for lighting, service, and \u003cstrong\u003eleak testing\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCorrect Thread Configuration:\u003c\/strong\u003e \u003cstrong\u003e1\/4-inch NPT male x 1\/4-inch NPT female\u003c\/strong\u003e connections match the original \u003cstrong\u003epilot tubing arrangement\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCross-Reference Included:\u003c\/strong\u003e The \u003cstrong\u003eApollo\/Conbraco 94MBV02 (94-MBV-02)\u003c\/strong\u003e \u003cstrong\u003emini ball valve\u003c\/strong\u003e is the matching number if you are cross-checking by \u003cstrong\u003evalve manufacturer\u003c\/strong\u003e.\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 does a pilot line shut-off valve do?\u003c\/strong\u003e It \u003cstrong\u003eisolates gas to the pilot burner\u003c\/strong\u003e so you can \u003cstrong\u003elight, service, or leak-test\u003c\/strong\u003e the pilot circuit without shutting down the \u003cstrong\u003emain gas supply\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWhich boilers use it?\u003c\/strong\u003e Weil-McLain’s parts catalog lists \u003cstrong\u003e511-246-345\u003c\/strong\u003e under the \u003cstrong\u003eCSD-1 common parts for the LGB series\u003c\/strong\u003e. Confirm by boiler model and serial number before ordering.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIs it the same as 511-246-340?\u003c\/strong\u003e No. \u003cstrong\u003e511-246-340\u003c\/strong\u003e is a separate \u003cstrong\u003eKinco-Balon P2R\u003c\/strong\u003e valve in the same \u003cstrong\u003eLGB\u003c\/strong\u003e parts list. Match the \u003cstrong\u003e1\/4-inch male x female\u003c\/strong\u003e configuration to what is on your boiler.\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":67741630693554,"sku":"511-246-345","price":115.6,"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-511-246-345","provider":"GSIstore","version":"1.0","type":"link"}