{"product_id":"potterton-powermax-18l-exp-vessel-white","title":"POTTERTON POWERMAX P781 18L EXPANS VES WHITE","description":"\u003cp data-start=\"159\" data-end=\"478\"\u003eThe \u003cstrong data-start=\"163\" data-end=\"201\"\u003ePowermax P781 18L Expansion Vessel\u003c\/strong\u003e is a genuine replacement pressure vessel designed for use in compatible Powermax heating systems. The vessel absorbs excess pressure created as water expands during the heating cycle, protecting the system from over-pressurisation, leaks, and unnecessary strain on components.\u003c\/p\u003e\n\u003cp data-start=\"480\" data-end=\"759\"\u003eA degraded or waterlogged expansion vessel can cause repeated pressure drops, PRV discharge, noisy operation, or boiler lockouts. Replacing it with this genuine 18-litre Powermax vessel restores correct system pressure regulation and ensures stable, reliable heating performance.\u003c\/p\u003e\n\u003ch3 data-start=\"761\" data-end=\"781\"\u003e\u003cstrong data-start=\"765\" data-end=\"781\"\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"782\" data-end=\"1080\"\u003e\n\u003cli data-start=\"782\" data-end=\"823\"\u003e\n\u003cp data-start=\"784\" data-end=\"823\"\u003eGenuine Powermax 18L expansion vessel\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"824\" data-end=\"878\"\u003e\n\u003cp data-start=\"826\" data-end=\"878\"\u003eMaintains stable pressure during heating expansion\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"879\" data-end=\"929\"\u003e\n\u003cp data-start=\"881\" data-end=\"929\"\u003ePrevents over-pressurisation and PRV discharge\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"930\" data-end=\"983\"\u003e\n\u003cp data-start=\"932\" data-end=\"983\"\u003eHelps resolve pressure faults and system lockouts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"984\" data-end=\"1020\"\u003e\n\u003cp data-start=\"986\" data-end=\"1020\"\u003eDurable white steel construction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1021\" data-end=\"1080\"\u003e\n\u003cp data-start=\"1023\" data-end=\"1080\"\u003eDirect-fit replacement for straightforward installation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"1082\" data-end=\"1105\"\u003e\u003cstrong data-start=\"1086\" data-end=\"1105\"\u003eCompatible With\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1106\" data-end=\"1210\"\u003eSuitable for selected \u003cstrong data-start=\"1128\" data-end=\"1167\"\u003ePowermax boilers and thermal stores\u003c\/strong\u003e requiring expansion vessel \u003cstrong data-start=\"1195\" data-end=\"1209\"\u003eP781 (18L)\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"1212\" data-end=\"1305\"\u003e\u003cem data-start=\"1212\" data-end=\"1305\"\u003ePlease verify compatibility with your system manual or the existing vessel before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Potterton","offers":[{"title":"Default Title","offer_id":56695716544857,"sku":null,"price":91.61,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0982\/9738\/1209\/files\/1152028.jpg?v=1765294524","url":"https:\/\/plumbpartsxpressshop.com\/products\/potterton-powermax-18l-exp-vessel-white","provider":"Plumbparts xpress","version":"1.0","type":"link"}