{"product_id":"wilkins-xt-8-thermal-expansion-tank-2-1-gal-3-4-npt","title":"Wilkins xt-8 Thermal Expansion Tank 2.1 Gal 3\/4 Npt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe WILKINS xt-8 is a thermal expansion tank designed to protect residential potable hot water systems from pressure buildup caused by thermal expansion. When a backflow preventer or pressure reducing valve creates a closed system, heated water has nowhere to go — the xt-8 absorbs that excess pressure before it can stress the water heater, pipes, or fittings. The tank holds a total volume of 2.1 gallons with a 1.0 gallon acceptance capacity, and connects via a 3\/4 inch NPT fitting. Plumbers install this tank on the cold water supply line between the backflow preventer or PRV and the water heater inlet.\u003c\/p\u003e\u003cp\u003eThe xt-8 is suited for residential potable water installations where a closed system condition exists due to a backflow preventer, check valve, or pressure reducing valve. It is positioned on the cold water supply line upstream of the water heater to relieve thermal expansion pressure spikes during the heating cycle. This tank is intended for use in single-family and light residential applications with standard domestic water heaters, both gas and electric.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e2.1 gallon total tank volume with 1.0 gallon acceptance capacity\u003c\/li\u003e\n\u003cli\u003e3\/4 inch NPT connection for direct inline installation\u003c\/li\u003e\n\u003cli\u003eCompact form factor suited for tight mechanical room installations\u003c\/li\u003e\n\u003cli\u003eDesigned for potable water service — materials rated for drinking water contact\u003c\/li\u003e\n\u003cli\u003eRelieves thermal expansion pressure in closed-loop domestic hot water systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and new-installation thermal expansion tank for residential closed potable hot water systems protected by a backflow preventer or pressure reducing valve.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC). Shut off the water supply and depressurize the system before installation. The tank should be installed on the cold water supply line between the backflow preventer or PRV and the water heater — do not install on the hot side of the water heater. Verify the tank pre-charge pressure matches the system static water pressure before placing the system back in service.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTank Volume\u003c\/strong\u003e: 2.1 gallons\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAcceptance Capacity\u003c\/strong\u003e: 1.0 gallon\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Size\u003c\/strong\u003e: 3\/4 inch NPT\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: WILKINS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: xt-8\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"WILKINS","offers":[{"title":"Default Title","offer_id":51268092920114,"sku":"XT-8","price":375.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/308913148.jpg?v=1780698917","url":"https:\/\/voomisupply.com\/products\/wilkins-xt-8-thermal-expansion-tank-2-1-gal-3-4-npt","provider":"Voomi Supply","version":"1.0","type":"link"}