{"title":"Expansion Vessels \u0026 Accessories","description":"\u003cp\u003eBrowse our range of expansion vessels and accessories for plumbing and heating systems. Expansion vessels are essential spare parts for maintaining safe system pressure in boilers, unvented cylinders, and central heating systems. Our selection includes vessels in a variety of capacities along with related accessories to suit domestic and commercial installations.\u003c\/p\u003e","products":[{"product_id":"altecnic-24-litre-robokit-extra-sealed-system-kit-complete","title":"Altecnic 24 Litre Nitrogen Heating Expansion Vessel with Robokit Extra Sealed System Kit","description":"\u003cp\u003eThe Altecnic Robokit Extra Sealed System Kit includes a 24 Litre Expansion Vessel, an essential component for sealed central heating systems. This reliable and cost efficient vessel offers peace of mind upon installation, with multiple component siting options for system flexibility.\u003c\/p\u003e\n\u003cp\u003eNote: Sealed central heating systems are different from unvented mains pressure hot water systems, which only apply to the secondary hot water supply of a combined heating and hot water system.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNitrogen-filled heating expansion vessel\u003c\/li\u003e\n\u003cli\u003eIncludes wall-mounted sealed system RoboKit\u003c\/li\u003e\n\u003cli\u003eFlexible installation options\u003c\/li\u003e\n\u003cli\u003eCost-saving design\u003c\/li\u003e\n\u003cli\u003eNoise reduction\u003c\/li\u003e\n\u003cli\u003eLow maintenance costs\u003c\/li\u003e\n\u003cli\u003eIncludes expansion Vessel, Filling loop, Safety relief Valve complete with gauge, Mounting bracket, Quattro 4 way connector\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e* See technical attachments for more details.\u003c\/p\u003e","brand":"Altecnic Ltd","offers":[{"title":"Default Title","offer_id":50458648281434,"sku":"H000398","price":78.47,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4657\/6986\/files\/CA-900024_8ede4a89-cbdc-4716-87ca-abf2a760e68a.jpg?v=1744216825"},{"product_id":"altecnic-18-litre-robokit-extra-sealed-system-kit-complete","title":"Altecnic 18 Litre Nitrogen Heating Expansion Vessel with Robokit Extra Sealed System Kit","description":"\u003cp\u003eThe Altecnic Robokit Extra Sealed System Kit includes a 18 Litre Expansion Vessel, an essential component for sealed central heating systems. This reliable and cost efficient vessel offers peace of mind upon installation, with multiple component siting options for system flexibility.\u003c\/p\u003e\n\u003cp\u003eNote: Sealed central heating systems are different from unvented mains pressure hot water systems, which only apply to the secondary hot water supply of a combined heating and hot water system.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNitrogen-filled heating expansion vessel\u003c\/li\u003e\n\u003cli\u003eIncludes wall-mounted sealed system RoboKit\u003c\/li\u003e\n\u003cli\u003eFlexible installation options\u003c\/li\u003e\n\u003cli\u003eCost-saving design\u003c\/li\u003e\n\u003cli\u003eNoise reduction\u003c\/li\u003e\n\u003cli\u003eLow maintenance costs\u003c\/li\u003e\n\u003cli\u003eIncludes expansion Vessel, Filling loop, Safety relief Valve complete with gauge, Mounting bracket, Quattro 4 way connector\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Altecnic Ltd","offers":[{"title":"Default Title","offer_id":50458648314202,"sku":"H000395","price":73.17,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4657\/6986\/files\/CA-900018_250af306-a692-4427-b0af-6bd6d91bbf19.jpg?v=1743512560"},{"product_id":"altecnic-12-litre-robokit-extra-sealed-system-kit-complete","title":"Altecnic 12 Litre Nitrogen Heating Expansion Vessel with Robokit Extra Sealed System Kit","description":"\u003cp\u003eThe Altecnic Robokit Extra Sealed System Kit includes a 12 Litre Expansion Vessel, an essential component for sealed central heating systems. This reliable and cost efficient vessel offers peace of mind upon installation, with multiple component siting options for system flexibility.\u003c\/p\u003e\n\u003cp\u003eNote: Sealed central heating systems are different from unvented mains pressure hot water systems, which only apply to the secondary hot water supply of a combined heating and hot water system.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNitrogen-filled heating expansion vessel\u003c\/li\u003e\n\u003cli\u003eIncludes wall-mounted sealed system RoboKit\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFlexible installation options\u003c\/li\u003e\n\u003cli\u003eCost-saving design\u003c\/li\u003e\n\u003cli\u003eNoise reduction\u003c\/li\u003e\n\u003cli\u003eLow maintenance costs\u003c\/li\u003e\n\u003cli\u003eIncludes expansion Vessel, Filling loop, Safety relief Valve complete with gauge, Mounting bracket, Quattro 4 way connector\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Altecnic Ltd","offers":[{"title":"Default Title","offer_id":50458648346970,"sku":"H000393","price":69.91,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4657\/6986\/files\/CA-900012.jpg?v=1743090563"},{"product_id":"altecnic-133-1066-multifunction-plus-fixing-bracket","title":"Altecnic Multifunction Expansion Vessel Bracket Plus 133-1066","description":"\u003cp\u003eThe Altecnic Multifunction Expansion Vessel Bracket Plus comprises of an expansion vessel fixing bracket, isolation and drain off. The Altecnic Bracket Plus comes with a wall mount holder, 1\/2\" safety valve, 3\/8\" automatic air vent, 15mm x 3\/4\" straight DZR fitting, 3\/8\" DZR cap and brass union.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCompatible with heating containers of 2-25L capacity\u003c\/li\u003e\n\u003cli\u003eCompact design for effortless installation\u003c\/li\u003e\n\u003cli\u003eComes with an automatic air release\u003c\/li\u003e\n\u003cli\u003eFeatures 3\/4\" x 3\/4\" brass union and 3\/4 lockshield\u003c\/li\u003e\n\u003cli\u003eIncludes isolation and drainage for expansion vessels\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Altecnic Ltd","offers":[{"title":"Default Title","offer_id":50458648412506,"sku":"H000402","price":82.37,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4657\/6986\/files\/133-1066.jpg?v=1743090553"},{"product_id":"inta-18-litre-intafil-plus-sealed-system-kit-expansion-vessel-ifp18","title":"Inta 18 Litre Intafil Plus Sealed System Kit \u0026 Expansion Vessel IFP18","description":"\u003cp\u003eThe Inta 18 Litre Intafil Plus Sealed System Kit \u0026amp; Wall Mounted Heating Vessel (IFP18) provides a complete and compliant solution for sealed heating systems. Supplied with a filling loop, double check valve, isolating ball assembly, ball valve and safety relief valve with gauge, the kit is designed to meet G24.1 and G24.2 water regulations. Suitable for both retrofit and new build applications, the system offers flexible installation with a 360° rotatable connection and wall-mounted vessel. With a manual set point indicator and fully CPR-compliant construction, the Intafil Plus kit delivers reliable performance and ease of installation for professional heating systems.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e* See technical attachments for more details.\u003c\/p\u003e","brand":"Intatec","offers":[{"title":"Default Title","offer_id":53910179971418,"sku":"H001488","price":71.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4657\/6986\/files\/IFP18_1-1020x1536.jpg?v=1774956244"},{"product_id":"reliance-12l-potable-water-expansion-vessel-xves050040","title":"Reliance 12L Potable Water Expansion Vessel XVES050040","description":"\u003cp\u003eThe Reliance Aquasystem® XVES050040 12 Litre Potable Water Expansion Vessel is designed for unvented hot water systems, safely accommodating thermal expansion to help maintain system pressure and protect components. Its replaceable EPDM membrane separates the water from the steel shell to prevent internal corrosion and preserve water quality, while the stainless steel bolted flange ensures long-lasting durability. WRAS Approved and CE marked, it's a reliable choice for domestic and light commercial potable water installations.\u003c\/p\u003e\n\u003cp\u003ePlease contact Oceanair for more details.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e* See technical attachments for more details.\u003c\/p\u003e","brand":"Advanced Water","offers":[{"title":"Default Title","offer_id":54412046434650,"sku":"H004545","price":61.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4657\/6986\/files\/XVES050040.webp?v=1783948050"},{"product_id":"reliance-18l-potable-water-expansion-vessel-xves050050","title":"Reliance 18L Potable Water Expansion Vessel XVES050050","description":"\u003cp\u003eThe Reliance Aquasystem® XVES050050 18 Litre Potable Water Expansion Vessel is designed for unvented hot water systems, safely accommodating thermal expansion to help maintain system pressure and protect components. Its replaceable EPDM membrane separates the water from the steel shell to prevent internal corrosion and preserve water quality, while the stainless steel bolted flange ensures long-lasting durability. WRAS Approved and CE marked, it's a reliable choice for domestic and light commercial potable water installations.\u003c\/p\u003e\n\u003cp\u003ePlease contact Oceanair for more details.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e* See technical attachments for more details.\u003c\/p\u003e","brand":"Advanced Water","offers":[{"title":"Default Title","offer_id":54412046467418,"sku":"H004546","price":63.68,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4657\/6986\/files\/XVES050040.webp?v=1783948050"},{"product_id":"reliance-24l-potable-water-expansion-vessel-xves050060","title":"Reliance 24L Potable Water Expansion Vessel XVES050060","description":"\u003cp\u003eThe Reliance Aquasystem® XVES050060 24 Litre Potable Water Expansion Vessel is designed for unvented hot water systems, safely accommodating thermal expansion to help maintain system pressure and protect components. Its replaceable EPDM membrane separates the water from the steel shell to prevent internal corrosion and preserve water quality, while the stainless steel bolted flange ensures long-lasting durability. WRAS Approved and CE marked, it's a reliable choice for domestic and light commercial potable water installations.\u003c\/p\u003e\n\u003cp\u003ePlease contact Oceanair for more details.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e* See technical attachments for more details.\u003c\/p\u003e","brand":"Advanced Water","offers":[{"title":"Default Title","offer_id":54412046500186,"sku":"H004547","price":76.34,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4657\/6986\/files\/XVES050040.webp?v=1783948050"},{"product_id":"reliance-12l-potable-water-expansion-vessel-with-bracket-xves050045","title":"Reliance 12L Potable Water Expansion Vessel with Bracket XVES050045","description":"\u003cp\u003eThe Reliance Aquasystem® XVES050040 12 Litre Potable Water Expansion Vessel with mounting bracket is designed for unvented hot water systems, safely accommodating thermal expansion to help maintain system pressure and protect components. Its replaceable EPDM membrane separates the water from the steel shell to prevent internal corrosion and preserve water quality, while the stainless steel bolted flange ensures long-lasting durability. WRAS Approved and CE marked, it's a reliable choice for domestic and light commercial potable water installations.\u003c\/p\u003e\n\u003cp\u003ePlease contact Oceanair for more details.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e* See technical attachments for more details.\u003c\/p\u003e","brand":"Advanced Water","offers":[{"title":"Default Title","offer_id":54412046532954,"sku":"H004549","price":48.19,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4657\/6986\/files\/XVES050040.webp?v=1783948050"},{"product_id":"reliance-18l-potable-water-expansion-vessel-with-bracket-xves050055","title":"Reliance 18L Potable Water Expansion Vessel with Bracket XVES050055","description":"\u003cp\u003eThe Reliance Aquasystem® XVES050055 18 Litre Potable Water Expansion Vessel with bracket is designed for unvented hot water systems, safely accommodating thermal expansion to help maintain system pressure and protect components. Its replaceable EPDM membrane separates the water from the steel shell to prevent internal corrosion and preserve water quality, while the stainless steel bolted flange ensures long-lasting durability. WRAS Approved and CE marked, it's a reliable choice for domestic and light commercial potable water installations.\u003c\/p\u003e\n\u003cp\u003ePlease contact Oceanair for more details.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e* See technical attachments for more details.\u003c\/p\u003e","brand":"Advanced Water","offers":[{"title":"Default Title","offer_id":54412046598490,"sku":"H004550","price":65.6,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4657\/6986\/files\/XVES050040.webp?v=1783948050"},{"product_id":"reliance-24l-potable-water-expansion-vessel-with-bracket-xves050065","title":"Reliance 24L Potable Water Expansion Vessel with Bracket XVES050065","description":"\u003cp\u003eThe Reliance Aquasystem® XVES050065 24 Litre Potable Water Expansion Vessel with bracket is designed for unvented hot water systems, safely accommodating thermal expansion to help maintain system pressure and protect components. Its replaceable EPDM membrane separates the water from the steel shell to prevent internal corrosion and preserve water quality, while the stainless steel bolted flange ensures long-lasting durability. WRAS Approved and CE marked, it's a reliable choice for domestic and light commercial potable water installations.\u003c\/p\u003e\n\u003cp\u003ePlease contact Oceanair for more details.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e?\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e* See technical attachments for more details.\u003c\/p\u003e","brand":"Advanced Water","offers":[{"title":"Default Title","offer_id":54412046631258,"sku":"H004551","price":61.93,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0844\/4657\/6986\/files\/XVES050040.webp?v=1783948050"}],"url":"https:\/\/www.oceanairuk.com\/collections\/expansion-vessels-accessories.oembed","provider":"Oceanair","version":"1.0","type":"link"}