{"product_id":"weil-mclain-511-246-340","title":"Weil McLain 511-246-340 Valve","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 511-246-340 Pilot Shut-Off Valve\u003c\/strong\u003e is the \u003cstrong\u003eOEM manual gas valve\u003c\/strong\u003e that isolates the \u003cstrong\u003epilot gas line\u003c\/strong\u003e on \u003cstrong\u003eWeil-McLain gas-fired boilers\u003c\/strong\u003e. In Weil-McLain's own \u003cstrong\u003eLGB-6 to LGB-20 Series 2 control supplement\u003c\/strong\u003e parts list it appears as the \u003cstrong\u003ePilot shut-off valve\u003c\/strong\u003e, described as a \u003cstrong\u003eKinco-Balon P2R\u003c\/strong\u003e, and the same \u003cstrong\u003e511-246-340\u003c\/strong\u003e is listed again in that parts list as the \u003cstrong\u003eLeak test valve\u003c\/strong\u003e. The factory photo shows a compact \u003cstrong\u003ecast aluminum-colored body\u003c\/strong\u003e marked \u003cstrong\u003eON\u003c\/strong\u003e, a \u003cstrong\u003epaddle-style thumb handle\u003c\/strong\u003e, a \u003cstrong\u003ezinc-plated 1\/8-inch male pipe thread\u003c\/strong\u003e on top and a \u003cstrong\u003e1\/4-inch brass compression nut\u003c\/strong\u003e on the outlet end. It is a \u003cstrong\u003emanual gas valve, 1\/8-inch male by 1\/4-inch compression\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eA \u003cstrong\u003epilot shut-off valve\u003c\/strong\u003e does one job: it lets you \u003cstrong\u003eclose the gas to the pilot\u003c\/strong\u003e without touching the \u003cstrong\u003emain gas line\u003c\/strong\u003e or the \u003cstrong\u003emain manual shut-off valve\u003c\/strong\u003e. That matters on \u003cstrong\u003estanding-pilot\u003c\/strong\u003e and \u003cstrong\u003eintermittent-pilot\u003c\/strong\u003e systems when you need to \u003cstrong\u003eservice the pilot assembly\u003c\/strong\u003e, \u003cstrong\u003ereplace the thermocouple or flame sensor\u003c\/strong\u003e, \u003cstrong\u003eleak-test the pilot tubing\u003c\/strong\u003e or \u003cstrong\u003eshut the pilot off for the season\u003c\/strong\u003e. The \u003cstrong\u003ehandle\u003c\/strong\u003e turns a \u003cstrong\u003eseat\u003c\/strong\u003e inside the \u003cstrong\u003ecast body\u003c\/strong\u003e, and over time the \u003cstrong\u003eseat\u003c\/strong\u003e can \u003cstrong\u003eweep gas\u003c\/strong\u003e, the \u003cstrong\u003ehandle\u003c\/strong\u003e can \u003cstrong\u003estiffen or seize\u003c\/strong\u003e, or the \u003cstrong\u003ecompression connection\u003c\/strong\u003e can \u003cstrong\u003eloosen\u003c\/strong\u003e. Any of those is a reason to replace the \u003cstrong\u003e511-246-340\u003c\/strong\u003e instead of \u003cstrong\u003ere-torquing\u003c\/strong\u003e it.\u003c\/p\u003e\n\n\u003cp\u003eMatch it by number, because Weil-McLain uses more than one \u003cstrong\u003epilot shut-off valve\u003c\/strong\u003e. The \u003cstrong\u003e511-246-345\u003c\/strong\u003e is a different part, a \u003cstrong\u003e1\/4-inch NPT male by female pilot line manual shut-off valve\u003c\/strong\u003e, while the \u003cstrong\u003e511-246-340\u003c\/strong\u003e is the \u003cstrong\u003eKinco-Balon P2R\u003c\/strong\u003e with the \u003cstrong\u003e1\/8-inch male by 1\/4-inch compression\u003c\/strong\u003e connections shown on the \u003cstrong\u003eLGB\u003c\/strong\u003e supplement. Before replacing it, \u003cstrong\u003eshut off the main gas\u003c\/strong\u003e, let the \u003cstrong\u003epilot\u003c\/strong\u003e go out, loosen the \u003cstrong\u003ecompression nut\u003c\/strong\u003e carefully, fit the new \u003cstrong\u003e511-246-340\u003c\/strong\u003e with approved \u003cstrong\u003epipe sealant\u003c\/strong\u003e on the \u003cstrong\u003emale thread\u003c\/strong\u003e, restore the \u003cstrong\u003egas\u003c\/strong\u003e and \u003cstrong\u003eleak-test every joint\u003c\/strong\u003e with a \u003cstrong\u003ebubble solution\u003c\/strong\u003e before you \u003cstrong\u003erelight\u003c\/strong\u003e. This is work for a \u003cstrong\u003equalified gas technician\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 Weil-McLain part:\u003c\/strong\u003e The \u003cstrong\u003e511-246-340\u003c\/strong\u003e is the \u003cstrong\u003efactory number\u003c\/strong\u003e Weil-McLain shows for the \u003cstrong\u003eKinco-Balon P2R\u003c\/strong\u003e \u003cstrong\u003epilot shut-off valve\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIsolates the pilot line:\u003c\/strong\u003e Lets you \u003cstrong\u003eshut the pilot gas\u003c\/strong\u003e for \u003cstrong\u003eservice\u003c\/strong\u003e and \u003cstrong\u003eseasonal shutdown\u003c\/strong\u003e without touching the \u003cstrong\u003emain gas train\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCompact manual valve:\u003c\/strong\u003e A \u003cstrong\u003epaddle thumb handle\u003c\/strong\u003e, \u003cstrong\u003e1\/8-inch male\u003c\/strong\u003e connection and \u003cstrong\u003e1\/4-inch compression nut\u003c\/strong\u003e keep it small enough for the tight \u003cstrong\u003epilot tubing\u003c\/strong\u003e run.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eClear identification:\u003c\/strong\u003e Separate from the \u003cstrong\u003e511-246-345\u003c\/strong\u003e, so you can order the \u003cstrong\u003eright valve\u003c\/strong\u003e by \u003cstrong\u003enumber\u003c\/strong\u003e.\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 is the Weil McLain 511-246-340?\u003c\/strong\u003e\u003cbr\u003eIt is a \u003cstrong\u003emanual pilot shut-off valve\u003c\/strong\u003e, the \u003cstrong\u003eKinco-Balon P2R\u003c\/strong\u003e shown on the \u003cstrong\u003eLGB-6 to LGB-20 Series 2\u003c\/strong\u003e control supplement parts list as both the \u003cstrong\u003epilot shut-off valve\u003c\/strong\u003e and the \u003cstrong\u003eleak test valve\u003c\/strong\u003e, with a \u003cstrong\u003e1\/8-inch male\u003c\/strong\u003e and \u003cstrong\u003e1\/4-inch compression\u003c\/strong\u003e connection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it the same as the 511-246-345?\u003c\/strong\u003e\u003cbr\u003eNo. The \u003cstrong\u003e511-246-345\u003c\/strong\u003e is a separate \u003cstrong\u003epilot line manual shut-off valve\u003c\/strong\u003e with a \u003cstrong\u003e1\/4-inch NPT male by female\u003c\/strong\u003e connection. Order the \u003cstrong\u003e511-246-340\u003c\/strong\u003e only when the old valve is a \u003cstrong\u003eKinco-Balon P2R\u003c\/strong\u003e or is specified under that \u003cstrong\u003enumber\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I know the old valve needs replacing?\u003c\/strong\u003e\u003cbr\u003eA \u003cstrong\u003estiff or seized handle\u003c\/strong\u003e, \u003cstrong\u003egas odor at the valve\u003c\/strong\u003e, or a \u003cstrong\u003ebubble test\u003c\/strong\u003e that shows \u003cstrong\u003eleakage at the seat or connections\u003c\/strong\u003e means the \u003cstrong\u003evalve\u003c\/strong\u003e should be replaced. Always \u003cstrong\u003eleak-test\u003c\/strong\u003e after the repair.\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\n","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":67918852620466,"sku":"511-246-340","price":83.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/511-246-340.jpg?v=1793994298","url":"https:\/\/www.gsistore.com\/products\/weil-mclain-511-246-340","provider":"GSIstore","version":"1.0","type":"link"}