{"product_id":"weil-mclain-511-405-143","title":"Weil McLain 511-405-143 Cartridge Circulator","description":"\u003cp\u003eThe \u003cstrong\u003eWeil McLain 511-405-143 Cartridge Circulator\u003c\/strong\u003e is a \u003cstrong\u003ereplacement circulator cartridge\u003c\/strong\u003e: the working heart of a \u003cstrong\u003ewet-rotor\u003c\/strong\u003e circulator, built around a \u003cstrong\u003estainless-steel cartridge body\u003c\/strong\u003e with a \u003cstrong\u003eblack impeller\u003c\/strong\u003e. The cartridge is pictured with a round \u003cstrong\u003eO-ring\u003c\/strong\u003e and \u003cstrong\u003efour socket-head cap screws\u003c\/strong\u003e, the hardware used to secure a cartridge to its \u003cstrong\u003ehousing\u003c\/strong\u003e. When a \u003cstrong\u003eboiler circulator\u003c\/strong\u003e has quit and the \u003cstrong\u003ehousing\u003c\/strong\u003e is still sound, replacing the cartridge is the repair that gets the loop moving again.\u003c\/p\u003e\n\n\u003cp\u003eHere is how the cartridge style works in the field. In a \u003cstrong\u003ewet-rotor\u003c\/strong\u003e circulator the \u003cstrong\u003erotor, shaft, bearings and impeller\u003c\/strong\u003e turn together as one assembly in the system water, and that water lubricates and cools the \u003cstrong\u003ebearings\u003c\/strong\u003e. When one of those parts wears out, the usual symptoms are a pump that hums without turning, a growl or rattle from worn \u003cstrong\u003ebearings\u003c\/strong\u003e, a motor that runs hot, or \u003cstrong\u003eradiators\u003c\/strong\u003e that stay cold while the boiler fires. Because the working parts are packaged as a cartridge, you replace the assembly that wore out instead of buying and piping in a whole new circulator.\u003c\/p\u003e\n\n\u003cp\u003eMatch the cartridge to the pump already on the boiler before you order. Read the \u003cstrong\u003enameplate or label\u003c\/strong\u003e on the existing circulator, note the model number, and compare it against the Weil McLain number \u003cstrong\u003e511-405-143\u003c\/strong\u003e. Send us the boiler model and a photo of the \u003cstrong\u003epump label\u003c\/strong\u003e if you want a second set of eyes. When you install it, \u003cstrong\u003eisolate and drain the circulator branch\u003c\/strong\u003e, inspect the \u003cstrong\u003ehousing\u003c\/strong\u003e face and \u003cstrong\u003eO-ring seat\u003c\/strong\u003e for scale or nicks, seat the \u003cstrong\u003eO-ring\u003c\/strong\u003e cleanly, and tighten the \u003cstrong\u003efour socket-head cap screws\u003c\/strong\u003e evenly in a \u003cstrong\u003ecross pattern\u003c\/strong\u003e. Then \u003cstrong\u003epurge the air out of the loop\u003c\/strong\u003e so the new cartridge never runs dry.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eComplete Cartridge Assembly:\u003c\/strong\u003e A stainless-steel cartridge body and black \u003cstrong\u003eimpeller\u003c\/strong\u003e in one unit, so you are not piecing together a rebuild.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHardware Pictured:\u003c\/strong\u003e A round \u003cstrong\u003eO-ring\u003c\/strong\u003e and \u003cstrong\u003efour socket-head cap screws\u003c\/strong\u003e are shown with the cartridge.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRepair Instead Of Replace:\u003c\/strong\u003e Swap the worn working assembly rather than the whole circulator, and get the heating loop back in service sooner.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWeil McLain Service Number:\u003c\/strong\u003e \u003cstrong\u003e511-405-143\u003c\/strong\u003e is the number to search for and order against when you need this cartridge.\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 is the 511-405-143?\u003c\/strong\u003e It is a Weil McLain \u003cstrong\u003ecartridge circulator\u003c\/strong\u003e: a \u003cstrong\u003estainless-steel cartridge body\u003c\/strong\u003e with a \u003cstrong\u003eblack impeller\u003c\/strong\u003e, shown with an \u003cstrong\u003eO-ring\u003c\/strong\u003e and \u003cstrong\u003efour socket-head cap screws\u003c\/strong\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHow do I confirm it matches my circulator?\u003c\/strong\u003e Check the label on the pump on your boiler for the model number and compare it with this listing. Send us the boiler model and the \u003cstrong\u003epump label\u003c\/strong\u003e, and we will confirm the match before you buy.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eWhat tells me a circulator cartridge has failed?\u003c\/strong\u003e A pump that hums but does not spin, noisy \u003cstrong\u003ebearings\u003c\/strong\u003e, a motor that runs hot, or a boiler that fires while the \u003cstrong\u003eradiators\u003c\/strong\u003e stay cold are the common signs. Confirm the pump is not simply airbound before you condemn the cartridge.\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":67955913752754,"sku":"511-405-143","price":389.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/511-405-143.jpg?v=1794255768","url":"https:\/\/www.gsistore.com\/en-ca\/products\/weil-mclain-511-405-143","provider":"GSIstore","version":"1.0","type":"link"}