{"product_id":"heating-expansion-vessel-part-l-filling-kit-8-25l-g3-4-wras","title":"Heating Expansion Vessel Part L Filling Kit | 8-25L | G3\/4 WRAS","description":"\u003c!-- SEO Product Name: Trade-Tec Heating Expansion Vessel Part L Filling Kit | 8-25L | G3\/4 WRAS --\u003e\n\u003cdiv style=\"font-size: 16px; max-width: 900px; margin: 0 auto; color: #2b2b2b; line-height: 1.6; font-family: Arial, Helvetica, sans-serif;\"\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.7; color: #2b2b2b; margin: 0 0 16px 0;\"\u003eThe \u003cstrong\u003eTrade-Tec Heating Expansion Vessel \u0026amp; Part L Filling Kit\u003c\/strong\u003e is a complete, ready-to-fit package for sealed central heating systems, manufactured by \u003cstrong\u003eZilmet\u003c\/strong\u003e and supplied under the Trade-Tec brand. Each kit bundles the pressure vessel itself with the safety valve, pressure gauge, wall mounting bracket and braided filling hose needed to complete a \u003cstrong\u003ePart L compliant\u003c\/strong\u003e installation in a single order, saving installers from sourcing ancillaries separately.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.7; color: #2b2b2b; margin: 0 0 16px 0;\"\u003eEvery vessel is factory pressure-tested before despatch and finished in a durable powder-coated red shell, designed to accommodate the thermal expansion of water in a closed heating circuit and protect the boiler, pipework and valves from over-pressurisation. The range is available in four capacities — \u003cstrong\u003e8, 12, 18 and 25 litres\u003c\/strong\u003e — to suit system sizes from a small flat to a larger domestic installation, with a consistent \u003cstrong\u003eG3\/4″ connection\u003c\/strong\u003e across every size.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; margin: 0 -4px 20px -4px;\"\u003e\n\u003cdiv style=\"flex: 1; min-width: 110px; background: #008377CF; color: #fff; border-radius: 8px; padding: 14px 10px; text-align: center; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: 800; line-height: 1.1;\"\u003e4 bar\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; opacity: .9; margin-top: 4px;\"\u003eMax Working Pressure\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 110px; background: #008377CF; color: #fff; border-radius: 8px; padding: 14px 10px; text-align: center; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: 800; line-height: 1.1;\"\u003e1 bar\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; opacity: .9; margin-top: 4px;\"\u003eFactory Pre-Charge\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 110px; background: #008377CF; color: #fff; border-radius: 8px; padding: 14px 10px; text-align: center; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: 800; line-height: 1.1;\"\u003e90°C\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; opacity: .9; margin-top: 4px;\"\u003eMax System Temp\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 110px; background: #008377CF; color: #fff; border-radius: 8px; padding: 14px 10px; text-align: center; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: 800; line-height: 1.1;\"\u003eG3\/4″\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; opacity: .9; margin-top: 4px;\"\u003eConnection Size\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 110px; background: #008377CF; color: #fff; border-radius: 8px; padding: 14px 10px; text-align: center; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: 800; line-height: 1.1;\"\u003e100%\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; opacity: .9; margin-top: 4px;\"\u003eFactory Tested\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 110px; background: #008377CF; color: #fff; border-radius: 8px; padding: 14px 10px; text-align: center; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: 800; line-height: 1.1;\"\u003e4 Sizes\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; opacity: .9; margin-top: 4px;\"\u003e8-25 Litre Range\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #FFF6E5; border-left: 4px solid #E0942A; border-radius: 0 6px 6px 0; padding: 14px 18px; margin: 0 0 18px 0;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #e0942a; font-size: 14px; text-transform: uppercase; letter-spacing: .04em; margin-bottom: 6px;\"\u003ePlease Note\u003c\/div\u003e\n\u003cdiv style=\"font-size: 15px; color: #2b2b2b; line-height: 1.6;\"\u003eThis kit is designed for \u003cstrong\u003esealed heating systems only\u003c\/strong\u003e and is not WRAS-approved for potable (drinking) water use. Trade-Tec also produce a separate potable expansion vessel range for unvented hot water cylinders — check the connection type and application on the vessel label before installation.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #FDECEC; border-left: 4px solid #D32F2F; border-radius: 0 6px 6px 0; padding: 14px 18px; margin: 0 0 18px 0;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #d32f2f; font-size: 14px; text-transform: uppercase; letter-spacing: .04em; margin-bottom: 6px;\"\u003eImportant Safety Information\u003c\/div\u003e\n\u003cdiv style=\"font-size: 15px; color: #2b2b2b; line-height: 1.6;\"\u003eThe system in which this vessel is installed \u003cstrong\u003emust include a pressure-limiting device\u003c\/strong\u003e such as a pressure relief valve, and installation should only be carried out by a suitably qualified, Gas Safe or equivalent registered installer. Sizing calculations must be performed by a competent engineer — using an incorrectly sized vessel can result in reduced service life, property damage or personal injury.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #E6F4F3; border-left: 4px solid #008377CF; border-radius: 0 6px 6px 0; padding: 14px 18px; margin: 0 0 18px 0;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; font-size: 14px; text-transform: uppercase; letter-spacing: .04em; margin-bottom: 6px;\"\u003eGood to Know\u003c\/div\u003e\n\u003cdiv style=\"font-size: 15px; color: #2b2b2b; line-height: 1.6;\"\u003eIn hard water areas, fitting a water softener such as an \u003cstrong\u003eActivFlo\u003c\/strong\u003e unit is recommended to reduce the risk of calcium deposits forming in the vessel and system over time.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; margin: 0 -6px 20px -6px;\"\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #F7FAFA; border: 1px solid #D9EDEA; border-top: 3px solid #008377CF; border-radius: 6px; padding: 16px; margin: 6px;\"\u003e\n\u003cdiv style=\"font-size: 15px; font-weight: bold; color: #00625d; margin-bottom: 6px;\"\u003eComplete Part L Kit\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #333; line-height: 1.6;\"\u003eIncludes vessel, combined safety valve with pressure gauge, and a braided flexible filling loop with isolating valves — everything needed for one compliant, professional install.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #F7FAFA; border: 1px solid #D9EDEA; border-top: 3px solid #008377CF; border-radius: 6px; padding: 16px; margin: 6px;\"\u003e\n\u003cdiv style=\"font-size: 15px; font-weight: bold; color: #00625d; margin-bottom: 6px;\"\u003eFactory Pressure-Tested\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #333; line-height: 1.6;\"\u003e\n\u003cstrong\u003eEvery vessel is 100% factory tested\u003c\/strong\u003e before it leaves production, checking the weld seams and internal membrane are leak-free from day one on site.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #F7FAFA; border: 1px solid #D9EDEA; border-top: 3px solid #008377CF; border-radius: 6px; padding: 16px; margin: 6px;\"\u003e\n\u003cdiv style=\"font-size: 15px; font-weight: bold; color: #00625d; margin-bottom: 6px;\"\u003eReplaceable Membrane\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #333; line-height: 1.6;\"\u003eThe internal diaphragm can be replaced in the field without swapping the whole vessel, keeping long-term maintenance costs down and extending the working life of the unit.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #F7FAFA; border: 1px solid #D9EDEA; border-top: 3px solid #008377CF; border-radius: 6px; padding: 16px; margin: 6px;\"\u003e\n\u003cdiv style=\"font-size: 15px; font-weight: bold; color: #00625d; margin-bottom: 6px;\"\u003eDurable Powder-Coated Finish\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #333; line-height: 1.6;\"\u003eThe rouge red powder-coated shell resists corrosion in damp plant rooms and airing cupboards, and gives a neat, professional appearance in visible installations.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #F7FAFA; border: 1px solid #D9EDEA; border-top: 3px solid #008377CF; border-radius: 6px; padding: 16px; margin: 6px;\"\u003e\n\u003cdiv style=\"font-size: 15px; font-weight: bold; color: #00625d; margin-bottom: 6px;\"\u003eWall Mounting Bracket Included\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #333; line-height: 1.6;\"\u003eA dedicated mounting bracket is supplied with every kit, giving a secure, properly supported fixing point rather than relying on pipework alone to carry the vessel's weight.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #F7FAFA; border: 1px solid #D9EDEA; border-top: 3px solid #008377CF; border-radius: 6px; padding: 16px; margin: 6px;\"\u003e\n\u003cdiv style=\"font-size: 15px; font-weight: bold; color: #00625d; margin-bottom: 6px;\"\u003eWide Sizing Range\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #333; line-height: 1.6;\"\u003eAvailable across \u003cstrong\u003e8, 12, 18 and 25 litre\u003c\/strong\u003e capacities on the same G3\/4″ connection, covering everything from compact systems to larger domestic heating installations.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #fff; font-weight: bold; font-size: 13px; letter-spacing: .05em; text-transform: uppercase; padding: 9px 14px; border-radius: 4px 4px 0 0;\"\u003eVessel Specification\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-top: none; margin-bottom: 18px;\"\u003e\n\u003cdiv style=\"display: flex; background: #E6F4F3; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 46%; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px;\"\u003eManufacturer\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 9px 14px; color: #222; font-size: 14px;\"\u003eZilmet (Trade-Tec range)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #ffffff; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 46%; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px;\"\u003eApplication\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 9px 14px; color: #222; font-size: 14px;\"\u003eSealed central heating systems (not potable water)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #E6F4F3; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 46%; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px;\"\u003eMax. working pressure\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 9px 14px; color: #222; font-size: 14px;\"\u003e4 bar\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #ffffff; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 46%; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px;\"\u003eFactory pre-charge pressure\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 9px 14px; color: #222; font-size: 14px;\"\u003e1 bar (±20% tolerance)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #E6F4F3; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 46%; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px;\"\u003eMax. system temperature\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 9px 14px; color: #222; font-size: 14px;\"\u003e90°C (with suitable thermostatic control)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #ffffff; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 46%; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px;\"\u003eVessel temperature range\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 9px 14px; color: #222; font-size: 14px;\"\u003e-10°C to 70°C\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #E6F4F3; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 46%; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px;\"\u003eConnection\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 9px 14px; color: #222; font-size: 14px;\"\u003eG3\/4″\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #ffffff; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 46%; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px;\"\u003eExternal finish\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 9px 14px; color: #222; font-size: 14px;\"\u003ePowder-coated, rouge red\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #E6F4F3; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 46%; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px;\"\u003eMembrane\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 9px 14px; color: #222; font-size: 14px;\"\u003eFlexible synthetic diaphragm, field-replaceable\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #ffffff; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 46%; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px;\"\u003eCompliance\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 9px 14px; color: #222; font-size: 14px;\"\u003eManufactured to 2014\/68\/EU Pressure Equipment Directive\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #fff; font-weight: bold; font-size: 13px; letter-spacing: .05em; text-transform: uppercase; padding: 9px 14px; border-radius: 4px 4px 0 0;\"\u003eKit Contents\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-top: none; margin-bottom: 18px;\"\u003e\n\u003cdiv style=\"display: flex; background: #E6F4F3; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 46%; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px;\"\u003eIncluded\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 9px 14px; color: #222; font-size: 14px;\"\u003eExpansion vessel, combined safety relief valve with pressure gauge, braided flexible filling loop with isolating valves, wall mounting bracket\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #ffffff; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 46%; padding: 9px 14px; font-weight: 600; color: #333; font-size: 14px;\"\u003eStandard\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 9px 14px; color: #222; font-size: 14px;\"\u003eDesigned to support Part L compliant installation\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-radius: 6px; overflow: hidden; margin-bottom: 20px;\"\u003e\n\u003cdiv style=\"display: flex; background: #008377CF; color: #fff; border-radius: 6px 6px 0 0;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-weight: bold; font-size: 13px; text-transform: uppercase; letter-spacing: .03em;\"\u003eCapacity\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-weight: bold; font-size: 13px; text-transform: uppercase; letter-spacing: .03em;\"\u003eProduct Code\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-weight: bold; font-size: 13px; text-transform: uppercase; letter-spacing: .03em;\"\u003eDiameter\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-weight: bold; font-size: 13px; text-transform: uppercase; letter-spacing: .03em;\"\u003eHeight\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-weight: bold; font-size: 13px; text-transform: uppercase; letter-spacing: .03em;\"\u003eConnection\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #E6F4F3; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003e8 Litre\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003e130G000802\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003e217mm\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003e338mm\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003eG3\/4″\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #ffffff; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003e12 Litre\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003e130G001202\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003e267mm\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003e334mm\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003eG3\/4″\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #E6F4F3; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003e18 Litre\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003e130G001802B\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003e317mm\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003e299mm\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003eG3\/4″\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #ffffff; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003e24 Litre\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003e130G002502B*\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003e317mm\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003e341mm\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 12px; font-size: 14px; color: #222;\"\u003eG3\/4″\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdetails style=\"border: 1px solid #D9EDEA; border-radius: 6px; margin-bottom: 8px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; font-weight: bold; font-size: 14.5px; cursor: pointer; list-style: none;\"\u003eIs this kit suitable for a potable hot water cylinder?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 16px; font-size: 14.5px; color: #2b2b2b; line-height: 1.65; background: #fff;\"\u003eNo. This is a \u003cstrong\u003eheating-only\u003c\/strong\u003e expansion vessel and is not WRAS-approved for potable water. For an unvented hot water cylinder, a dedicated potable expansion vessel is required instead.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #D9EDEA; border-radius: 6px; margin-bottom: 8px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; font-weight: bold; font-size: 14.5px; cursor: pointer; list-style: none;\"\u003eWhat size vessel do I need for my system?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 16px; font-size: 14.5px; color: #2b2b2b; line-height: 1.65; background: #fff;\"\u003eVessel sizing depends on total system water content, boiler output, and the working pressures of the system and safety relief valve. This calculation should always be carried out by a qualified heating engineer using the correct sizing formula — do not select a size by system type alone.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #D9EDEA; border-radius: 6px; margin-bottom: 8px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; font-weight: bold; font-size: 14.5px; cursor: pointer; list-style: none;\"\u003eWhat is included in the Part L Filling Kit?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 16px; font-size: 14.5px; color: #2b2b2b; line-height: 1.65; background: #fff;\"\u003eEach kit includes the expansion vessel itself, a combined safety relief valve with integral pressure gauge, a braided flexible filling loop with isolating valves, and a wall mounting bracket.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #D9EDEA; border-radius: 6px; margin-bottom: 8px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; font-weight: bold; font-size: 14.5px; cursor: pointer; list-style: none;\"\u003eCan the pre-charge pressure be adjusted?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 16px; font-size: 14.5px; color: #2b2b2b; line-height: 1.65; background: #fff;\"\u003eYes, but only by a suitably qualified technician. Any change to the factory-set pre-charge must ensure the maximum working pressure of the system is never exceeded, and the new value should be recorded on the vessel's label.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #D9EDEA; border-radius: 6px; margin-bottom: 8px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; font-weight: bold; font-size: 14.5px; cursor: pointer; list-style: none;\"\u003eHow is the vessel maintained after installation?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 16px; font-size: 14.5px; color: #2b2b2b; line-height: 1.65; background: #fff;\"\u003eThe pre-charge pressure should be checked at least once a year against the value on the vessel label, and the outer casing can be cleaned periodically using water and mild soap only.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Zilmet","offers":[{"title":"8L","offer_id":66013358457181,"sku":"PTLEVP8KIT","price":57.0,"currency_code":"GBP","in_stock":true},{"title":"12L","offer_id":66013358489949,"sku":"PTLEVP12KIT","price":59.99,"currency_code":"GBP","in_stock":true},{"title":"18L","offer_id":66013358522717,"sku":"PTLEVP18KIT","price":63.0,"currency_code":"GBP","in_stock":true},{"title":"24L","offer_id":66013358555485,"sku":"PTLEVP24KIT","price":67.0,"currency_code":"GBP","in_stock":true},{"title":"35L","offer_id":66013358588253,"sku":"PTLEVP35KIT","price":85.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/Heating_Expansion_Vessel_Filling_Kit.jpg?v=1790226213","url":"https:\/\/qualityheating.co.uk\/products\/heating-expansion-vessel-part-l-filling-kit-8-25l-g3-4-wras","provider":"AIZO Quality Heating","version":"1.0","type":"link"}