1 Ensure expansion tank is sized properly for application (Figure 1). 2. Remove plastic cap ST-5, ST-8, ST only: Insert Turbulator into connector (optional). AMTROL ST (Therm-X-Trol) is a water heater expansion tank, designed for use in domestic hot water heating systems to eliminate the potential hazards of. Shop online for Therm-X-Trol model ST thermal expansion tank ( gallons) by Amtrol for domestic plumbing applications.

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Amtrol ST Therm-X-Trol Thermal Expansion Tank

See all customer images. Set up a giveaway. Page 1 of 1 Start over Page 1 of 1. The rep at the company was very helpful, so call if you have any questions. Only 14 left in stock – order soon. The colder water is heated to replace the hot water used. In Alpine Home Air Products became the first company to sell heating, air conditioning and indoor txnk products online.

It was easy to set the initial pressure and easy to install. Buy with confidence as the condition of this item and its timely delivery are guaranteed under the “Amazon A-to-z Guarantee”. Get fast, free shipping with Amazon Prime. Installed a water pressure regulator to bring the PSI down to It’s an optional accessory, but our municipal water supply has a ton of mineral content, so having the turbulator to create a flow of water expanwion the tank to prevent build up was something I wanted to do.


Thank you for your feedback. I had a problem with water expansion.

A company rep from Amtrol recommended Water pressure is 50 psi. New water heater installed.

Amtrol ST-12 Therm-X-Trol Non-ASME Thermal Expansion Tank

Packaging will be damaged. Fulfillment by Amazon FBA is a service we offer sellers that lets them store their products in Amazon’s fulfillment centers, and we directly pack, ship, and wt-12 customer service for these products.

I’m very pleased with the product and the customer service. Pages with related products. Share your thoughts with other customers.

Amtrol ST Thermal Expansion Tank – Water Heaters –

Your terms may vary and are subject to application. Is this feature helpful? Somehow, it still peaked causing a leak. Expansion Tank Type There are two basic expansion tank types: Rates range from 6.

Add all three to Cart Add all three to List. Loading recommendations for this item I mounted a T at the top of the tank where the cold goes in.


There are two basic expansion tank types: As the system water temperature reaches its maximum, the diaphragm st12 against the air cushion to allow for the increased water expansion. Past that, I’ve only had it installed about 2 months, so I should hope nothing’s gone wrong in such a short time!

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.

This “spillage” results in wasted BTU’s and a potential safety hazard for the homeowner. See all Used offers. This type of tank looses its st-122 cushion over the years and will need to be drained periodically.