{"product_id":"viessmann-100-wb1c-expansion-vessel-8-litre-refurbished-mpn-7837231","title":"Viessmann 100 WB1C Expansion Vessel 8 Litre – Refurbished | MPN 7837231","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003ePressure stability isn't a luxury in a heating system — it's a necessity. The \u003cstrong\u003eViessmann 8 Litre Expansion Vessel (MPN 7837231)\u003c\/strong\u003e is engineered to maintain that stability by continuously absorbing the pressure changes that occur as water heats and cools within your sealed circuit. Left unmanaged, those fluctuations place significant stress on your boiler's internal components — leading to wear, leaks, and eventually, failure. This vessel ensures that never happens.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eDesigned specifically for the \u003cstrong\u003eViessmann 100 WB1C\u003c\/strong\u003e, it slots in as a precise like-for-like replacement, restoring your system's pressure management without any modifications or guesswork. With an \u003cstrong\u003e8-litre capacity\u003c\/strong\u003e, it delivers consistent and reliable performance across every heating cycle — season after season.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThis is a professionally refurbished genuine Viessmann component, thoroughly inspected, cleaned, and tested under real operating conditions before dispatch. Same quality. Smarter price.\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eViessmann 100 WB1C Expansion Vessel (8ltr)\u003c\/li\u003e\n\u003cli\u003ePart Number: 7837231\u003c\/li\u003e\n\u003cli\u003eCondition: Refurbished\u003c\/li\u003e\n\u003cli\u003eComes with 12-months warranty\u003c\/li\u003e\n\u003cli\u003eCompatible with Viessmann 100 WB1C, WB1HA, WB1HC, WB1KC, and WBP JA boiler series\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eHere's the table ready to copy and paste directly:\u003c\/p\u003e\n\u003ctable style=\"width: 100.036%; height: 411.6px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003cth style=\"width: 64.7249%; height: 19.6px;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"width: 35.0593%; height: 19.6px;\"\u003eGC Number\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WB1C 26kW Combi (Serial No. 7499425)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e47-819-20 (7499425)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WB1C 30kW Combi (Serial No. 7499427)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e47-819-21 (7499427)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WB1C 35kW Combi (Serial No. 7499429)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e47-819-22 (7499429)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WB1KC 30kW Combi (Serial No. 7570675)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e47-819-41 (7570675)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WB1KC 35kW Combi (Serial No. 7570677)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e47-819-42 (7570677)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WB1C 30kW System (Serial No. 7499426)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e41-819-28 (7499426)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WB1C 35kW System (Serial No. 7499428)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e41-819-29 (7499428)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WB1C 26kW System (Serial No. 7499424)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e41-819-27 (7499424)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WB1C 19kW System (Serial No. 7499423)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e41-819-26 (7499423)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WB1HA 19kW System Erp (Serial No. 7543420)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e41-819-36 (7543420)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WB1HA 26kW System Erp (Serial No. 7543421)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e41-819-37 (7543421)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WB1HA 30kW System Erp (Serial No. 7543423)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e41-819-38 (7543423)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WB1HA 35kW System Erp (Serial No. 7543425)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e41-819-39 (7543425)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WB1HC 19kW System (Serial No. 7570671)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e41-819-40 (7570671)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WB1HC 26kW System (Serial No. 7570672)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e41-819-41 (7570672)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WB1HC 30kW System (Serial No. 7570674)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e41-819-42 (7570674)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WB1HC 35kW System (Serial No. 7570676)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e41-819-43 (7570676)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WB1KC 26kW Combi (Serial No. 7570673)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e47-819-40 (7570673)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WBP JA 25kW Combi (Serial No. 7501297)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e47-819-26 (7501297)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 64.7249%; height: 19.6px;\"\u003e100 WBP JA 29kW Combi (Serial No. 7501298)\u003c\/td\u003e\n\u003ctd style=\"width: 35.0593%; height: 19.6px;\"\u003e47-819-27 (7501298)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eRestored to Perform. Backed to Last.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eEvery refurbished unit is put through a rigorous testing and inspection process — only those that meet the required performance benchmarks make it to dispatch. You're not getting a gamble, you're getting a verified, warranty-backed component that's ready to install and built to last. The \u003cstrong\u003e12-month warranty\u003c\/strong\u003e included with every unit ensures that confidence doesn't end at the checkout.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eIt's also the sustainable choice — extending the life of a perfectly functional Viessmann part rather than adding to unnecessary manufacturing waste.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eDelivery \u0026amp; Returns\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eOrder before \u003cstrong\u003e3:00 PM\u003c\/strong\u003e for same-day dispatch via reliable couriers, with both \u003cstrong\u003estandard\u003c\/strong\u003e and \u003cstrong\u003enext working day delivery\u003c\/strong\u003e options available. Returns accepted within \u003cstrong\u003e30 days\u003c\/strong\u003e, provided the part is unused and in its original packaging.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eNote :\u003c\/strong\u003e Please confirm that \u003cstrong\u003eMPN 7837231\u003c\/strong\u003e matches your existing part before placing your order. Installation must always be carried out by a \u003cstrong\u003eGas Safe registered engineer\u003c\/strong\u003e to ensure safety compliance and warranty validity.\u003c\/p\u003e","brand":"Viessmann","offers":[{"title":"Refurbished","offer_id":47929787023525,"sku":null,"price":29.8,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0768\/1690\/8453\/files\/Frame19.png?v=1781714596","url":"https:\/\/ephsuppliers.com\/products\/viessmann-100-wb1c-expansion-vessel-8-litre-refurbished-mpn-7837231","provider":"Elite Plumbing \u0026 Heating Suppliers Ltd","version":"1.0","type":"link"}