{"product_id":"weil-mclain-511-246-330","title":"Weil McLain 511-246-330 Gas Valve","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 511-246-330 Manual Main Shut-Off Gas Valve\u003c\/strong\u003e is the \u003cstrong\u003eOEM 1-1\/4-inch NPT manual gas valve\u003c\/strong\u003e with a \u003cstrong\u003e1\/8-inch NPT downstream pressure tapping\u003c\/strong\u003e, used at the head of the \u003cstrong\u003egas train\u003c\/strong\u003e on \u003cstrong\u003eWeil-McLain gas boilers\u003c\/strong\u003e. Weil-McLain's \u003cstrong\u003eLGB-6 to LGB-20 Series 2 control supplement\u003c\/strong\u003e parts list shows it as the \u003cstrong\u003e1-1\/4-inch Kinco-Balon 600\u003c\/strong\u003e, with the \u003cstrong\u003e1-inch Kinco-Balon 500\u003c\/strong\u003e listed beside it as the \u003cstrong\u003e511-246-325\u003c\/strong\u003e. The factory photo shows the \u003cstrong\u003ecast 600\u003c\/strong\u003e mark on the body, the \u003cstrong\u003ec-CSA-us certification mark\u003c\/strong\u003e, a \u003cstrong\u003eflat lever handle\u003c\/strong\u003e on a \u003cstrong\u003edomed stem\u003c\/strong\u003e, \u003cstrong\u003ewrench flats\u003c\/strong\u003e on both \u003cstrong\u003epipe ends\u003c\/strong\u003e and a \u003cstrong\u003eside tapping\u003c\/strong\u003e with a \u003cstrong\u003escrew plug\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eA \u003cstrong\u003emanual main shut-off valve\u003c\/strong\u003e is the \u003cstrong\u003eservice isolation point\u003c\/strong\u003e for the \u003cstrong\u003eboiler gas train\u003c\/strong\u003e. It lets a \u003cstrong\u003etechnician\u003c\/strong\u003e close the \u003cstrong\u003egas supply\u003c\/strong\u003e before working on the \u003cstrong\u003egas valve\u003c\/strong\u003e, \u003cstrong\u003eregulator\u003c\/strong\u003e, \u003cstrong\u003epressure switches\u003c\/strong\u003e or \u003cstrong\u003eburner\u003c\/strong\u003e, and it gives the \u003cstrong\u003einstaller\u003c\/strong\u003e a \u003cstrong\u003esafe, accessible\u003c\/strong\u003e way to \u003cstrong\u003eshut the boiler down\u003c\/strong\u003e in an emergency. The \u003cstrong\u003e1\/8-inch NPT downstream tapping\u003c\/strong\u003e is the \u003cstrong\u003egauge port\u003c\/strong\u003e: with the \u003cstrong\u003evalve open\u003c\/strong\u003e and the \u003cstrong\u003eboiler firing\u003c\/strong\u003e, a \u003cstrong\u003emanometer\u003c\/strong\u003e connected there shows the \u003cstrong\u003egas pressure\u003c\/strong\u003e reaching the \u003cstrong\u003egas valve\u003c\/strong\u003e, which is the first reading you take when diagnosing \u003cstrong\u003eignition lockouts\u003c\/strong\u003e, \u003cstrong\u003elow flame\u003c\/strong\u003e or \u003cstrong\u003epressure switch trips\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eOver the years a \u003cstrong\u003elever valve\u003c\/strong\u003e can fail in recognizable ways: a \u003cstrong\u003ehandle that will not turn\u003c\/strong\u003e, \u003cstrong\u003egas seeping around the stem\u003c\/strong\u003e, \u003cstrong\u003eleakage at the pipe threads\u003c\/strong\u003e or a \u003cstrong\u003evalve that no longer shuts off fully\u003c\/strong\u003e. Do not tolerate any of them on a \u003cstrong\u003egas appliance\u003c\/strong\u003e. The \u003cstrong\u003e511-246-330\u003c\/strong\u003e belongs to a \u003cstrong\u003efamily\u003c\/strong\u003e of Weil-McLain shut-off valves, so keep the \u003cstrong\u003esizes\u003c\/strong\u003e straight: the \u003cstrong\u003e511-246-305\u003c\/strong\u003e is the \u003cstrong\u003e2-inch\u003c\/strong\u003e valve, the \u003cstrong\u003e511-246-325\u003c\/strong\u003e is the \u003cstrong\u003e1-inch\u003c\/strong\u003e valve and the \u003cstrong\u003e511-246-330\u003c\/strong\u003e is the \u003cstrong\u003e1-1\/4-inch\u003c\/strong\u003e valve, and the \u003cstrong\u003e511-246-340\u003c\/strong\u003e and \u003cstrong\u003e511-246-345\u003c\/strong\u003e are \u003cstrong\u003epilot-line\u003c\/strong\u003e valves. The \u003cstrong\u003e511-246-330\u003c\/strong\u003e is a \u003cstrong\u003emanual main shut-off\u003c\/strong\u003e; the factory \u003cstrong\u003eHoneywell\u003c\/strong\u003e gas valves listed beside it in the same parts list are separate parts. To replace it, \u003cstrong\u003eshut off the gas upstream\u003c\/strong\u003e, \u003cstrong\u003epurge and secure\u003c\/strong\u003e the line, \u003cstrong\u003ematch the pipe size\u003c\/strong\u003e, use approved \u003cstrong\u003epipe sealant\u003c\/strong\u003e on the \u003cstrong\u003emale threads\u003c\/strong\u003e, orient the \u003cstrong\u003ehandle\u003c\/strong\u003e and \u003cstrong\u003eflow direction\u003c\/strong\u003e as the old valve was installed, then \u003cstrong\u003eleak-test every joint\u003c\/strong\u003e with a \u003cstrong\u003ebubble solution\u003c\/strong\u003e and check the \u003cstrong\u003edownstream pressure\u003c\/strong\u003e at the \u003cstrong\u003etapping\u003c\/strong\u003e before putting the boiler back in service. This is work for a \u003cstrong\u003elicensed 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\u003e1-1\/4-inch NPT shut-off:\u003c\/strong\u003e The \u003cstrong\u003e1-1\/4-inch Kinco-Balon 600\u003c\/strong\u003e manual shut-off valve in the Weil-McLain \u003cstrong\u003eLGB\u003c\/strong\u003e control supplement parts list.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBuilt-in pressure tapping:\u003c\/strong\u003e A \u003cstrong\u003e1\/8-inch NPT downstream port\u003c\/strong\u003e gives you a \u003cstrong\u003egauge connection\u003c\/strong\u003e for \u003cstrong\u003egas pressure checks\u003c\/strong\u003e without adding a \u003cstrong\u003efitting\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOEM Weil-McLain number:\u003c\/strong\u003e The \u003cstrong\u003efactory 511-246-330\u003c\/strong\u003e, so you match the \u003cstrong\u003eold valve\u003c\/strong\u003e by \u003cstrong\u003epart number\u003c\/strong\u003e instead of guessing by \u003cstrong\u003esize\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePositive manual isolation:\u003c\/strong\u003e A \u003cstrong\u003elever handle\u003c\/strong\u003e gives a clear \u003cstrong\u003eopen or closed\u003c\/strong\u003e indication for \u003cstrong\u003eservice and safety shutdown\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 size is the Weil McLain 511-246-330?\u003c\/strong\u003e\u003cbr\u003eIt is a \u003cstrong\u003e1-1\/4-inch NPT\u003c\/strong\u003e \u003cstrong\u003emanual main shut-off gas valve\u003c\/strong\u003e with a \u003cstrong\u003e1\/8-inch NPT downstream pressure tapping\u003c\/strong\u003e. The \u003cstrong\u003e511-246-325\u003c\/strong\u003e is the \u003cstrong\u003e1-inch\u003c\/strong\u003e version and the \u003cstrong\u003e511-246-305\u003c\/strong\u003e is the \u003cstrong\u003e2-inch\u003c\/strong\u003e version.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the 1\/8-inch tapping for?\u003c\/strong\u003e\u003cbr\u003eIt is the \u003cstrong\u003edownstream pressure port\u003c\/strong\u003e. Connect a \u003cstrong\u003emanometer\u003c\/strong\u003e there to read \u003cstrong\u003egas pressure\u003c\/strong\u003e at the \u003cstrong\u003egas train\u003c\/strong\u003e while the \u003cstrong\u003eboiler\u003c\/strong\u003e fires.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen should the valve be replaced?\u003c\/strong\u003e\u003cbr\u003eReplace it if the \u003cstrong\u003ehandle is seized\u003c\/strong\u003e, if there is \u003cstrong\u003egas leakage at the stem or threads\u003c\/strong\u003e, or if it \u003cstrong\u003eno longer shuts off fully\u003c\/strong\u003e. \u003cstrong\u003eLeak-test\u003c\/strong\u003e all joints after 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\n","brand":"Weil McLain","offers":[{"title":"Default Title","offer_id":67918852751538,"sku":"511-246-330","price":152.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/511-246-330.jpg?v=1793994203","url":"https:\/\/www.gsistore.com\/products\/weil-mclain-511-246-330","provider":"GSIstore","version":"1.0","type":"link"}