{"product_id":"viessmann-100-w-wb1b-gas-valve-pre-owned-7828721","title":"Viessmann 100-W WB1B Gas Valve – Pre-Owned | Part No. 7828721","description":"\u003cp\u003eInconsistent combustion or ignition issues in a Viessmann Vitodens 100-W WB1B boiler — across Heat Only, Combi, System, or Compact configurations — often trace back to a gas valve no longer regulating gas delivery correctly. The \u003cstrong\u003eViessmann 100-W WB1B Gas Valve, Part No. 7828721\u003c\/strong\u003e, is the genuine replacement that ensures reliable gas flow regulation for consistent boiler performance.\u003c\/p\u003e\n\n\u003cp\u003eThis is a \u003cstrong\u003epre-owned\u003c\/strong\u003e part that has undergone full functional testing to meet quality standards before dispatch, restoring consistent, safe control of gas flow within the boiler.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatible Boiler Models\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eGC No. \/ Serial No.\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e100-W WB1B 13kW Heat Only\u003c\/td\u003e\n\u003ctd\u003e41-819-21\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100-W WB1B 16kW Heat Only\u003c\/td\u003e\n\u003ctd\u003e41-819-22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100-W WB1B 19kW Heat Only\u003c\/td\u003e\n\u003ctd\u003e41-819-23\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100-W WB1B 26kW Heat Only\u003c\/td\u003e\n\u003ctd\u003e41-819-24\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100-W WB1B 35kW Heat Only\u003c\/td\u003e\n\u003ctd\u003e41-819-25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100-W WB1B 26kW Combi\u003c\/td\u003e\n\u003ctd\u003e47-819-12 (Serial 7373061)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100-W WB1B 30kW Combi\u003c\/td\u003e\n\u003ctd\u003e47-819-13 (Serial 7373063)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100-W WB1B 35kW Combi\u003c\/td\u003e\n\u003ctd\u003e47-819-14 (Serial 7373065)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100-W WB1B 26kW System\u003c\/td\u003e\n\u003ctd\u003e41-819-18 (Serial 7373060)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100-W WB1B 30kW System\u003c\/td\u003e\n\u003ctd\u003e41-819-19 (Serial 7373062)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100-W WB1B 35kW System\u003c\/td\u003e\n\u003ctd\u003e41-819-20 (Serial 7373064)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100-W WB1B 13kW Compact\u003c\/td\u003e\n\u003ctd\u003eSerial 7416307\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100-W WB1B 16kW Compact\u003c\/td\u003e\n\u003ctd\u003eSerial 7416302\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100-W WB1B 19kW Compact\u003c\/td\u003e\n\u003ctd\u003eSerial 7416303\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100-W WB1B 26kW Compact\u003c\/td\u003e\n\u003ctd\u003eSerial 7416304\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTested for Quality. Backed by Warranty.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis 7828721 valve helps maintain safe combustion and efficient operation by controlling gas delivery to the burner. Replacing a faulty unit supports optimal heating efficiency and extends boiler life. Supplied with a \u003cstrong\u003e6-month warranty\u003c\/strong\u003e for added confidence.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDelivery \u0026amp; Returns\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrders placed before \u003cstrong\u003e1:00 PM\u003c\/strong\u003e are dispatched the same day via trusted couriers, with standard or next-day delivery available. Returns are accepted within \u003cstrong\u003e30 days\u003c\/strong\u003e if the part is unused and in its original packaging.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Safety Note:\u003c\/strong\u003e Please confirm your boiler's exact model and serial number against the compatibility table above before ordering. Gas valves must always be installed by a \u003cstrong\u003eGas Safe registered engineer\u003c\/strong\u003e, with a full gas-tightness test before the boiler is returned to service.\u003c\/p\u003e","brand":"Viessmann","offers":[{"title":"Pre-Owned","offer_id":47950354612389,"sku":"GAS-2948-A-BC","price":32.69,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0768\/1690\/8453\/files\/Viessmann-Gasvalve-7828721-100-W-WB1B.png?v=1782582589","url":"https:\/\/ephsuppliers.com\/products\/viessmann-100-w-wb1b-gas-valve-pre-owned-7828721","provider":"Elite Plumbing \u0026 Heating Suppliers Ltd","version":"1.0","type":"link"}