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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An expansion tank is a required component for all hot water boiler systems, and is designed to control system pressure and help reduce energy consumption of heating and circulating operations.

A quality tank, except for the dent. When demand is put upon a potable water system, hot water is drawn from the water heater. Before this tank, it would go over the pound setting and cause the relief valve to drip water on the floor. There was a problem filtering reviews right now. Either your browser does not support JavaScript, or it has been disabled. Thank you for your amyrol. Installed a water pressure regulator to bring the PSI down to Fremont, CA [ Change ].

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

Installed this Amtrol expansion tank and problem solved. This tank will not lose its air cushion unless the bladder becomes detached, at which point the tank would need to be replaced. Amazon Renewed Refurbished products with a warranty.


Bladder-type tanks contain a moving bladder, and requires either a separate pressure reducing valve as mentioned above or a fill-trol valve to maintain initial fill pressure of 12 psi expanwion higher depending upon the requirements of your system.

These might be good tanks, but I got two in a row with significant dents, The Amazon box looked good both times, but someone had played amtro, with the inner, Amtrol box. Other Sellers on Amazon. Thermal expansion occurs as domestic water is heated. Water Heaters Tankless Water Heaters.

Amazon Music Stream millions of songs. Ships from and sold by Binford Supply House. Pressure increases until the relief valve opens and the expanded water “spills” from the water heater.

Amtrol ST Therm-X-Trol Thermal Expansion Tank

Check tank and it is heavy with water. Sorry this feature requires JavaScript. Set up a giveaway. I even left the water pressure meter installed and tracked the peaks. See and discover other items: Top Reviews Most recent Top Reviews. Something we hope you’ll especially enjoy: Used on an 80 gallon hot water tank that was over pressurizing when the water company upgraded my tap with a check valve.


There are two basic expansion tank types: Intalled new water heater and the thermal pressure regulator leaked about 16 oz. This type of tank looses its air cushion over the years and will need to be drained periodically.


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Somehow, it still peaked causing a leak. Only 14 left in stock – order soon. New water heater installed.

Amtrol ST Thermal Expansion Tank – Water Heaters –

Expansion Tank Type There are two basic expansion tank types: The rep at the company was very helpful, so call if you have any questions. With modern plumbing codes mandating backflow prevention, thermal expansion can cause pressure buildup in domestic water systems. Amazon Restaurants Food delivery from local restaurants.

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