{"product_id":"viessmann-expansion-vessel-cri8-7828646","title":"Viessmann Vitodens 100-W WB1B Expansion Vessel CRI 8 – Refurbished | Part No. 7828646  7837892","description":"\u003cp\u003eThe expansion vessel is the silent guardian of boiler pressure. In a sealed heating circuit, water expands as it heats — and when the vessel's diaphragm fails, there is nowhere for that pressure to go except through the relief valve. Repeated activation causes cumulative damage to seals and internal components. The \u003cstrong\u003eViessmann Expansion Vessel CRI 8 (Part No. 7828646  7837892)\u003c\/strong\u003e is the exact OEM replacement for the \u003cstrong\u003eVitodens 100-W WB1B\u003c\/strong\u003e combi and system range, restoring pressure stability and protecting your boiler investment.\u003c\/p\u003e\n\u003cp\u003eThis is a professionally refurbished genuine Viessmann component. Each unit is stripped, cleaned, and pressure-tested to OEM specifications before dispatch. The \u003cstrong\u003e8-litre CRI capacity\u003c\/strong\u003e fits directly as a like-for-like replacement — no modifications needed — enabling a clean, compliant swap.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompatible Viessmann Models\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable style=\"width: 100%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eOutput Range\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVitodens 100-W WB1B Combi\u003c\/td\u003e\n\u003ctd\u003e26kW – 35kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVitodens 100-W WB1B System\u003c\/td\u003e\n\u003ctd\u003e26kW – 35kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOEM Quality. Proven Performance. Backed by Warranty.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEvery refurbished vessel is inspected and pressure-tested to OEM standards before dispatch. Reduces wear on pumps and heat exchangers by preventing overpressure cycling. Supplied with a full \u003cstrong\u003e12-month warranty\u003c\/strong\u003e — professional-grade reliability at a fraction of new-part cost.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDelivery \u0026amp; Returns\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrders placed before \u003cstrong\u003e3:00 PM\u003c\/strong\u003e are dispatched the same working day. \u003cstrong\u003eStandard\u003c\/strong\u003e and \u003cstrong\u003enext working day delivery\u003c\/strong\u003e options are available at checkout. Returns accepted within \u003cstrong\u003e30 days\u003c\/strong\u003e, provided the item is unused and in its original condition.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Please confirm that part number \u003cstrong\u003e7828646\u003c\/strong\u003e matches your existing vessel before placing your order. Installation must 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":47944892580005,"sku":"EXP-2092-A-BC","price":32.65,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0768\/1690\/8453\/files\/Frame147.png?v=1782492686","url":"https:\/\/ephsuppliers.com\/products\/viessmann-expansion-vessel-cri8-7828646","provider":"Elite Plumbing \u0026 Heating Suppliers Ltd","version":"1.0","type":"link"}