{"product_id":"amtrol-amtr-st-5-expansion-tank-2-gallon-3-4-inch","title":"Amtrol AMTR-ST-5 Expansion Tank 2 Gallon 3\/4 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe AMTROL AMTR-ST-5 is a thermal expansion tank for domestic hot water systems. It absorbs the pressure increase caused by thermal expansion when water is heated, protecting system components from overpressure damage. Rated to 150 psi maximum working pressure and a maximum temperature of 200 degrees F, this 2-gallon steel tank uses a factory-precharged air bladder to buffer volumetric expansion. It connects via a 3\/4 inch threaded fitting and is sized for typical residential water heater installations. Licensed plumbers and mechanical contractors are the primary installers of this component.\u003c\/p\u003e\n\u003cp\u003eThis expansion tank is designed for closed domestic hot water systems that incorporate a backflow preventer, a check valve, or a pressure reducing valve on the cold water supply. These devices create a closed system in which heated water has no path back to the municipal supply, making an expansion tank a code-required component in most jurisdictions. The AMTR-ST-5 is suited for residential and light commercial potable water heating applications where a compact, low-volume buffer tank is appropriate.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e2-gallon tank volume accommodates typical residential thermal expansion loads\u003c\/li\u003e\n  \u003cli\u003e150 psi maximum working pressure matches standard residential water heater and PRV ratings\u003c\/li\u003e\n  \u003cli\u003e200 degrees F maximum temperature rating suitable for domestic hot water service\u003c\/li\u003e\n  \u003cli\u003e3\/4 inch threaded connection for straightforward integration into standard supply piping\u003c\/li\u003e\n  \u003cli\u003eSteel construction with a maximum acceptance factor of 0.45\u003c\/li\u003e\n  \u003cli\u003e7-year manufacturer warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement and new-installation expansion tank for closed domestic hot water systems requiring a 2-gallon, 3\/4 inch threaded expansion vessel rated to 150 psi.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed plumber in accordance with applicable local plumbing codes and the International Plumbing Code (IPC). Shut off the cold water supply and relieve system pressure before installing or replacing the tank. Verify the factory air precharge pressure matches the static supply pressure at the installation point before connecting the tank. Do not exceed the rated working pressure or temperature limits of the tank.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTank Volume\u003c\/strong\u003e: 2 gallons\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax Pressure\u003c\/strong\u003e: 150 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax Temperature\u003c\/strong\u003e: 200 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Type\u003c\/strong\u003e: Threaded\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConnection Size\u003c\/strong\u003e: 3\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMax Acceptance Factor\u003c\/strong\u003e: 0.45\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 12.83 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 5 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWarranty\u003c\/strong\u003e: 7 years\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Plumbing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: AMTROL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: AMTR-ST-5\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AMTROL","offers":[{"title":"Default Title","offer_id":51383708582194,"sku":"AMTR-ST-5","price":91.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/312669997.jpg?v=1782605064","url":"https:\/\/voomisupply.com\/products\/amtrol-amtr-st-5-expansion-tank-2-gallon-3-4-inch","provider":"Voomi Supply","version":"1.0","type":"link"}