{"title":"Expansion Vessels \u0026 unvented Kits","description":null,"products":[{"product_id":"ariston-water-heater-kit-a-2-litre-expansion-vessel-and-nrv-406801-replacement-spare-part","title":"Ariston Water Heater Kit A 2 Litre Expansion Vessel and NRV 406801 | Replacement Spare Part","description":"\u003ch3\u003e\u003cspan style=\"font-size:20px\"\u003eAriston Water Heater Kit A 2 Litre Expansion Vessel and NRV 406801 - Replacement Spare Part\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan style=\"font-size:16px\"\u003e\u003cbr\u003eDimensions - Height: 237mm, Width: 125mm, Depth: 125mm. \u003cbr\u003eCompatible Ariston 406801 Kit A for Europrisma, Andris, Andris Lux and Andris Lux Eco 10, 15 and 30 litre 2kW and 3kW unvented water heaters. Contains a 2 litre expansion vessel and non-return valve. G3 qualified installation required.The price shown includes FREE DELIVERY.\u003cbr\u003eFor any more information on this product or to see if there is a better alternative, just call one of our products experts on 01934 311800.\u003c\/span\u003e\u003c\/p\u003e","brand":"Ariston","offers":[{"title":"Default Title","offer_id":54880454377811,"sku":"WHSARI808","price":44.94,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/9433\/1475\/files\/kit_a_1_1.png?v=1792147041"},{"product_id":"heatrae-sadia-pack-u5-expansion-vessel-and-check-valve-95970356-replacement-spare-part","title":"Heatrae Sadia Pack U5 Expansion Vessel and Check Valve 95970356 | Replacement Spare Part","description":"\u003ch3\u003e\u003cspan style=\"font-size:20px\"\u003eHeatrae Sadia Pack U5 Expansion Vessel and Check Valve 95970356 | Replacement Spare Part\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan style=\"font-size:16px\"\u003e\u003cbr\u003eDimensions - Height: 230mm, Width: 125mm, Depth: 125mm. \u003cbr\u003eCompatible replacement 95970356 Pack U5 expansion vessel and check valve for Heatrae Sadia Megaflo domestic unvented cylinders. Accommodates thermal expansion within the system and prevents back-flow to the mains. G3 qualified installation required.The price shown includes FREE DELIVERY.\u003cbr\u003eFor any more information on this product or to see if there is a better alternative, just call one of our products experts on 01934 311800.\u003c\/span\u003e\u003c\/p\u003e","brand":"Heatrae Sadia","offers":[{"title":"Default Title","offer_id":54880454672723,"sku":"WHSSADIA17","price":193.49,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/9433\/1475\/files\/product_2_-_2-litre-potable-expansion-vessel-check-valve-small_2.jpg?v=1792147039"},{"product_id":"santon-alk02-vessel-kit-94970009-replacement-spare-part","title":"Santon ALK02 Vessel Kit 94970009 | Replacement Spare Part","description":"\u003ch3\u003e\u003cspan style=\"font-size:20px\"\u003eSanton ALK02 Vessel Kit 94970009 | Replacement Spare Part\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan style=\"font-size:16px\"\u003e\u003cbr\u003eA vessel kit for the Santon Aqualine less than 4.1 bar.The price shown includes FREE DELIVERY.\u003cbr\u003eFor any more information on this product or to see if there is a better alternative, just call one of our products experts on 01934 311800.\u003c\/span\u003e\u003c\/p\u003e","brand":"Santon","offers":[{"title":"Default Title","offer_id":54880481050963,"sku":"WHSSANTON29","price":85.78,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/9433\/1475\/files\/santon_alk02_vessel_kit_94970009_2_2053f393-ec9d-4d1e-812c-00bd931fe911.png?v=1792147039"},{"product_id":"zip-aq2-expansion-vessel-and-check-valve-replacement-spare-part","title":"Zip AQ2 Expansion Vessel and Check Valve | Replacement Spare Part","description":"\u003ch3\u003e\u003cspan style=\"font-size:20px\"\u003eZip AQ2 Expansion Vessel and Check Valve | Replacement Spare Part\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan style=\"font-size:16px\"\u003e\u003cbr\u003eCompatible replacement AQ2 expansion vessel and check valve for Zip Aquapoint III water heaters. Required where an external expansion vessel is needed for the installation.The price shown includes FREE DELIVERY.\u003cbr\u003eFor any more information on this product or to see if there is a better alternative, just call one of our products experts on 01934 311800.\u003c\/span\u003e\u003c\/p\u003e","brand":"Zip","offers":[{"title":"Default Title","offer_id":54880502317395,"sku":"WHSZIPM69","price":109.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/9433\/1475\/files\/zip_aq2_expansion_vessel_and_check_valve_dc16b702-263f-4b12-b21f-3016525b8850.png?v=1792147041"},{"product_id":"oso-hotwater-super-s-expansion-vessel-6l-115800-genuine-replacement-spare-part","title":"OSO Hotwater Super S Expansion Vessel 6L 115800 | Genuine Replacement Spare Part","description":"\u003ch3\u003e\u003cspan style=\"font-size:20px\"\u003eOSO Hotwater Super S Expansion Vessel 6L 115800 | Genuine Replacement Spare Part\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan style=\"font-size:16px\"\u003e\u003cbr\u003eOSO Hotwater Super S Expansion Vessel 6L The OSO Hot Water Super S Expansion Vessel 6L (Model: 115800) is an essential component for maintaining pressure stability in closed-loop heating systems.The price shown includes FREE DELIVERY.\u003cbr\u003eFor any more information on this product or to see if there is a better alternative, just call one of our products experts on 01934 311800.\u003c\/span\u003e\u003c\/p\u003e","brand":"OSO","offers":[{"title":"Default Title","offer_id":54880517488979,"sku":"WHSOSOSPARE04","price":84.41,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/9433\/1475\/files\/super_s_expansion_vessel.png?v=1792147044"},{"product_id":"baxi-5114691-expansion-vessel-8-litre-replacement-spare-part","title":"Baxi 5114691 Expansion Vessel 8 Litre | Replacement Spare Part","description":"\u003ch3\u003e\u003cspan style=\"font-size:20px\"\u003eBaxi 5114691 Expansion Vessel 8 Litre | Replacement Spare Part\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan style=\"font-size:16px\"\u003e\u003cbr\u003eCompatible 8-litre expansion vessel for Baxi combi and system boilers in the 24-28kW output range. Absorbs pressure fluctuations as water expands when heated, protecting the system from pressure surges. Gas Safe registered engineer required.The price shown includes FREE DELIVERY.\u003cbr\u003eFor any more information on this product or to see if there is a better alternative, just call one of our products experts on 01934 311800.\u003c\/span\u003e\u003c\/p\u003e","brand":"Baxi","offers":[{"title":"Default Title","offer_id":54880528400723,"sku":"WHSBAXIGAS02","price":42.97,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/9433\/1475\/files\/baxi_expansion_vessel.png?v=1792147061"},{"product_id":"baxi-5114692-expansion-vessel-10l-replacement-spare-part","title":"Baxi 5114692 Expansion Vessel 10L | Replacement Spare Part","description":"\u003ch3\u003e\u003cspan style=\"font-size:20px\"\u003eBaxi 5114692 Expansion Vessel 10L | Replacement Spare Part\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan style=\"font-size:16px\"\u003e\u003cbr\u003eCompatible 10-litre expansion vessel for Baxi combi and system boilers in the 33-40kW output range. Absorbs water pressure fluctuations as the system heats. Gas Safe registered engineer required.The price shown includes FREE DELIVERY.\u003cbr\u003eFor any more information on this product or to see if there is a better alternative, just call one of our products experts on 01934 311800.\u003c\/span\u003e\u003c\/p\u003e","brand":"Baxi","offers":[{"title":"Default Title","offer_id":54880531743059,"sku":"WHSBAXIGAS36","price":51.56,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/9433\/1475\/files\/5114692_1.png?v=1792147072"},{"product_id":"baxi-7683801-7l-expansion-vessel-replacement-spare-part","title":"Baxi 7683801 7L Expansion Vessel | Replacement Spare Part","description":"\u003ch3\u003e\u003cspan style=\"font-size:20px\"\u003eBaxi 7683801 7L Expansion Vessel | Replacement Spare Part\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan style=\"font-size:16px\"\u003e\u003cbr\u003eCompatible 7-litre expansion vessel kit specific to the Baxi 600 Combi range (624, 630, 636). Absorbs water expansion pressure to prevent system overpressure and protect boiler components. Gas Safe registered engineer required.The price shown includes FREE DELIVERY.\u003cbr\u003eFor any more information on this product or to see if there is a better alternative, just call one of our products experts on 01934 311800.\u003c\/span\u003e\u003c\/p\u003e","brand":"Baxi","offers":[{"title":"Default Title","offer_id":54880531808595,"sku":"WHSBAXIGAS37","price":71.45,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/9433\/1475\/files\/baxi37.png?v=1792147071"},{"product_id":"baxi-720759301-expansion-vessel-6l-genuine-replacement-spare-part","title":"Baxi 720759301 Expansion Vessel 6L | Genuine Replacement Spare Part","description":"\u003ch3\u003e\u003cspan style=\"font-size:20px\"\u003eBaxi 720759301 Expansion Vessel 6L | Genuine Replacement Spare Part\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan style=\"font-size:16px\"\u003e\u003cbr\u003eGenuine Baxi 720759301 6-litre expansion vessel for the Neta-tec GA and Duo-tec 2 platform. Absorbs water expansion pressure changes within the sealed heating system. Gas Safe registered engineer required.The price shown includes FREE DELIVERY.\u003cbr\u003eFor any more information on this product or to see if there is a better alternative, just call one of our products experts on 01934 311800.\u003c\/span\u003e\u003c\/p\u003e","brand":"Baxi","offers":[{"title":"Default Title","offer_id":54880534790483,"sku":"WHSBAXIGAS55","price":102.96,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/9433\/1475\/files\/720759301.png?v=1792147078"},{"product_id":"worcester-bosch-87161055450-6-litre-expansion-vessel-replacement-spare-part","title":"Worcester Bosch 87161055450 6 Litre Expansion Vessel | Replacement Spare Part","description":"\u003ch3\u003e\u003cspan style=\"font-size:20px\"\u003eWorcester Bosch 87161055450 6 Litre Expansion Vessel | Replacement Spare Part\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan style=\"font-size:16px\"\u003e\u003cbr\u003eCompatible 6-litre expansion vessel for Worcester Bosch Greenstar boilers. Absorbs the pressure increase as heating water expands in the sealed system, maintaining safe operating pressure. Gas Safe registered engineer required.The price shown includes FREE DELIVERY.\u003cbr\u003eFor any more information on this product or to see if there is a better alternative, just call one of our products experts on 01934 311800.\u003c\/span\u003e\u003c\/p\u003e","brand":"Worcester Bosch","offers":[{"title":"Default Title","offer_id":54880543867219,"sku":"WHSWORCESTERGAS14","price":65.83,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/9433\/1475\/files\/871610554502_c310aae7-2454-4fdc-aa35-008b4cfb7824.png?v=1792147124"},{"product_id":"worcester-bosch-8716122434-expansion-vessel-replacement-spare-part","title":"Worcester Bosch 8716122434 Expansion Vessel | Replacement Spare Part","description":"\u003ch3\u003e\u003cspan style=\"font-size:20px\"\u003eWorcester Bosch 8716122434 Expansion Vessel | Replacement Spare Part\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan style=\"font-size:16px\"\u003e\u003cbr\u003eCompatible expansion vessel for Worcester Bosch Greenstar boilers. Absorbs the pressure increase as heated water expands in the sealed system, preventing overpressure and protecting system components. Gas Safe registered engineer required.The price shown includes FREE DELIVERY.\u003cbr\u003eFor any more information on this product or to see if there is a better alternative, just call one of our products experts on 01934 311800.\u003c\/span\u003e\u003c\/p\u003e","brand":"Worcester Bosch","offers":[{"title":"Default Title","offer_id":54880544915795,"sku":"WHSWORCESTERGAS29","price":80.1,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/9433\/1475\/files\/alt8716122434.png?v=1792147130"},{"product_id":"ideal-177540-expansion-vessel-kit-replacement-spare-part","title":"Ideal 177540 Expansion Vessel Kit | Replacement Spare Part","description":"\u003ch3\u003e\u003cspan style=\"font-size:20px\"\u003eIdeal 177540 Expansion Vessel Kit | Replacement Spare Part\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan style=\"font-size:16px\"\u003e\u003cbr\u003eReplacement 8-litre expansion vessel kit for Ideal Logic, Logic+, Independent and i Mini gas boilers (ABK serial prefix onwards). Fitting by a Gas Safe registered engineer required.The price shown includes FREE DELIVERY.\u003cbr\u003eFor any more information on this product or to see if there is a better alternative, just call one of our products experts on 01934 311800.\u003c\/span\u003e\u003c\/p\u003e","brand":"Ideal","offers":[{"title":"Default Title","offer_id":54880552485203,"sku":"WHSIDEALGAS06","price":107.46,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/9433\/1475\/files\/ideal_177540_expansion_vessel_kit.png?v=1792147199"},{"product_id":"ideal-175551-expansion-vessel-kit-replacement-spare-part","title":"Ideal 175551 Expansion Vessel Kit | Replacement Spare Part","description":"\u003ch3\u003e\u003cspan style=\"font-size:20px\"\u003eIdeal 175551 Expansion Vessel Kit | Replacement Spare Part\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan style=\"font-size:16px\"\u003e\u003cbr\u003eReplacement 8-litre expansion vessel kit for Ideal Logic, Logic+, Independent, i Mini and Keston combi gas boilers. Fitting by a Gas Safe registered engineer required.The price shown includes FREE DELIVERY.\u003cbr\u003eFor any more information on this product or to see if there is a better alternative, just call one of our products experts on 01934 311800.\u003c\/span\u003e\u003c\/p\u003e","brand":"Ideal","offers":[{"title":"Default Title","offer_id":54880553042259,"sku":"WHSIDEALGAS16","price":123.06,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/9433\/1475\/files\/ideal_175551_expansion_vessel_kit.png?v=1792147203"},{"product_id":"vaillant-181051-expansion-vessel-replacement-spare-part","title":"Vaillant 181051 Expansion Vessel | Replacement Spare Part","description":"\u003ch3\u003e\u003cspan style=\"font-size:20px\"\u003eVaillant 181051 Expansion Vessel | Replacement Spare Part\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan style=\"font-size:16px\"\u003e\u003cbr\u003eCompatible replacement 181051 10-litre expansion vessel for Vaillant ecoTEC Plus, ecoTEC Pro and ecomax gas boilers. Maintains correct system pressure. Must be fitted by a Gas Safe registered engineer.The price shown includes FREE DELIVERY.\u003cbr\u003eFor any more information on this product or to see if there is a better alternative, just call one of our products experts on 01934 311800.\u003c\/span\u003e\u003c\/p\u003e","brand":"Vaillant","offers":[{"title":"Default Title","offer_id":54880555499859,"sku":"WHSVAILLANTSPARES11","price":69.97,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/9433\/1475\/files\/alt181051.png?v=1792147167"},{"product_id":"vaillant-0020237676-expansion-vessel-replacement-spare-part","title":"Vaillant 0020237676 Expansion Vessel | Replacement Spare Part","description":"\u003ch3\u003e\u003cspan style=\"font-size:20px\"\u003eVaillant 0020237676 Expansion Vessel | Replacement Spare Part\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan style=\"font-size:16px\"\u003e\u003cbr\u003eCompatible replacement 0020237676 8-litre expansion vessel for Vaillant ecoFIT Pure and ecoFIT Sustain gas boilers. Maintains correct system pressure and protects against pressure surges. Must be fitted by a Gas Safe registered engineer.The price shown includes FREE DELIVERY.\u003cbr\u003eFor any more information on this product or to see if there is a better alternative, just call one of our products experts on 01934 311800.\u003c\/span\u003e\u003c\/p\u003e","brand":"Vaillant","offers":[{"title":"Default Title","offer_id":54880556089683,"sku":"WHSVAILLANTSPARES26","price":81.68,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/9433\/1475\/files\/0020237676_2.png?v=1792147172"},{"product_id":"glow-worm-20020744-expansion-vessel-replacement-spare-part","title":"Glow-Worm 20020744 Expansion Vessel | Replacement Spare Part","description":"\u003ch3\u003e\u003cspan style=\"font-size:20px\"\u003eGlow-Worm 20020744 Expansion Vessel | Replacement Spare Part\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan style=\"font-size:16px\"\u003e\u003cbr\u003eCompatible expansion vessel for Glow-Worm Flexicom and Ultracom boilers. Absorbs system pressure variations as water expands during heating cycles, preventing excessive pressure build-up. Gas Safe registered engineer required.The price shown includes FREE DELIVERY.\u003cbr\u003eFor any more information on this product or to see if there is a better alternative, just call one of our products experts on 01934 311800.\u003c\/span\u003e\u003c\/p\u003e","brand":"Glow-Worm","offers":[{"title":"Default Title","offer_id":54880561824083,"sku":"WHSGLOWWORM008","price":53.06,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/9433\/1475\/files\/20020744.png?v=1792147231"},{"product_id":"ideal-176865-expansion-vessel-kit-genuine-replacement-spare-part","title":"Ideal 176865 Expansion Vessel Kit | Genuine Replacement Spare Part","description":"\u003ch3\u003e\u003cspan style=\"font-size:20px\"\u003eIdeal 176865 Expansion Vessel Kit | Genuine Replacement Spare Part\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan style=\"font-size:16px\"\u003e\u003cbr\u003eReplacement 10-litre expansion vessel kit (pushfit) for Ideal Vogue, Vogue System, Logic+ and Independent gas boilers. Fitting by a Gas Safe registered engineer required.The price shown includes FREE DELIVERY.\u003cbr\u003eFor any more information on this product or to see if there is a better alternative, just call one of our products experts on 01934 311800.\u003c\/span\u003e\u003c\/p\u003e","brand":"Ideal","offers":[{"title":"Default Title","offer_id":54880569262419,"sku":"WHSIDEALGAS71","price":137.09,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/9433\/1475\/files\/ideal_176865_expansion_vessel_kit.png?v=1792147220"},{"product_id":"ideal-177601-expansion-vessel-kit-genuine-replacement-spare-part","title":"Ideal 177601 Expansion Vessel Kit | Genuine Replacement Spare Part","description":"\u003ch3\u003e\u003cspan style=\"font-size:20px\"\u003eIdeal 177601 Expansion Vessel Kit | Genuine Replacement Spare Part\u003c\/span\u003e\u003c\/h3\u003e\u003cp\u003e\u003cspan style=\"font-size:16px\"\u003e\u003cbr\u003eReplacement expansion vessel kit for Ideal Atlantic, Classic 2, Esprit Eco, Exclusive and Instinct combi gas boilers (ACE serial prefix onwards). Fitting by a Gas Safe registered engineer required.The price shown includes FREE DELIVERY.\u003cbr\u003eFor any more information on this product or to see if there is a better alternative, just call one of our products experts on 01934 311800.\u003c\/span\u003e\u003c\/p\u003e","brand":"Ideal","offers":[{"title":"Default Title","offer_id":54880572211539,"sku":"WHSIDEALGAS82","price":126.72,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/9433\/1475\/files\/177601.png?v=1792147223"}],"url":"https:\/\/waterheatingspares.co.uk\/collections\/expansion-vessels-unvented-kits.oembed","provider":"Water Heating Spares","version":"1.0","type":"link"}