Amtrol ST-5 (Therm-X-Trol) is a water heater expansion tank, designed for use in domestic hot water heating systems to eliminate the potential hazards of water. Get the Therm-X-Trol Expansion Tank ST-5, easy to install helps eliminate BTU and water waste from The Home Depot. Ships in 1 Week. Buy AMTROL ST-5 on and get the best price.

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Amazon Drive Cloud storage from Amazon. Write a customer review. Amazon Music Stream millions of songs. I received a courteous and prompt response answering all my questions. It can help you on many aspects of plumbing management.

One of these items ships sooner than the other. Technical Specification Warranty [pdf ].

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AMTROL ST-5 Thermal Expansion Tank – Water Heaters –

Connected this to it and boom, done. Amazon Renewed Refurbished products with a warranty. Shopbop Designer Fashion Brands. Roll over image to zoom in.

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A “heat trap” is recommended with most water heater manufactures. The ST-5 was suitable for our gallon gas water heater based on the parameters we input, which includes the typical expected input vs output temperature differential, water pressure, and antrol valve limit. Amazon Inspire Digital Educational Resources. It was extremely easy to replace as it screws right in with the addition of some plumber’s tape.


Amtrol ST-5C Therm-X-Trol ASME Thermal Expansion Tank – 150 PSI

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What other items do customers buy after viewing this item? Plain steel tanks have no moving parts, and require a separate pressure reducing valve to maintain initial fill pressure of 12 psi or higher depending upon the requirements of your system. Does your boiler blow off steam?

Turn on 1-Click ordering for this browser. Product Description Amtrak invented the thermal expansion tank to control pressure build-up in closed, hot water systems. Withoutabox Submit to Film Festivals.

Customers who bought this item also bought. The first failed after about 6 years. Fired up the boiler and it all came back to temp and pressure without incident. Sorry, we’re having trouble showing recommendations right now. Used the ST-5 to replace a failed tank. St-55 Choose a language for shopping. Follow the amrol as outlined and be sure to wrap the threads several times with the Teflon tape.

East Dane Designer Men’s Fashion. As the system water temperature increases, the expanded water is absorbed by the tank. Water heater manufacturers and plumbing codes require the installation of an expansion control device if a backflow preventor, pressure reducing valve or check valve is installed in the domestic supply line. Worked great, appears great quality.


From the Manufacturer Amtrol invented the thermal expansion tank to control pressure build-up in closed, hot water systems. Ships from and sold by Amazon. Product information Technical Details.

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Amtrol ST-5C Therm-X-Trol Thermal Expansion Tank

Returns water to the system when hot water is used Prevents dripping faucets, intermittent toilet fill and pressure relief valve discharge Protects water heater, appliances and fixtures. Its cheap, and once you get after it, easy to replace! I also contacted their customer service department prior to purchase in order to clarify a few questions. This is a good value and would recommend it to anyone installing a new expansion tank. Testing monthly for failure is easy – just tap either end and listen for the sound to change from a thud water to a ringing air.

Install it right side up [connection side up] and try to install with a union. Specifications Expansion Tank Type There are two basic expansion tank types: Please enable your browser’s cookies to use this site.

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