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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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Used on an 80 gallon hot water tank that was over pressurizing when the water company upgraded my tap with a check valve.

Sorry this feature requires JavaScript. I upgraded from a 2 gallon to 5 gallon units.

Technical Details

As the water is heated, thermal expansion occurs. Intalled new water heater and the thermal pressure regulator leaked about 16 oz. It also has a turbolator device at the water inlet which helps control sediment. Before this tank, it would go over the pound setting and cause the relief valve to drip water on the floor. Withoutabox Submit to Film Festivals.

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Amtrol ST Therm-X-Trol Thermal Expansion Tank

Please call us for a suitable alternate product. It never peaked over 50 PSI. Rates range from 6. Compare with similar items.


No problems sg-12 2 weeks. English Choose a language for shopping. See questions and answers. Technical Specification Warranty [pdf ]. Amazon Drive Cloud storage from Amazon. Have one to sell? Amazon Inspire Digital Educational Resources.

There are two basic expansion tank types: This type of tank looses its air cushion over the years and will need to be drained periodically.

Discounted Items – Huge Savings! Installed this Amtrol expansion tank and problem solved.


Alpine Home Air Products. Please enable your browser’s cookies to use this site. Left unchecked, the resulting pressure increase can cause relief valve discharge and other potentially unsafe conditions.

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Amtrol ST Thermal Expansion Tank – Water Heaters –

I’m very pleased with the product and the customer service. Pressurized expanskon before install. Not for children under amtgol yrs. Always check air pressure at least once a year and make sure before installation that you match your house water pressure with the preset pressure of the tank. Both are intended to control the high end pressure of expabsion boiler system and keep the relief valve from opening due to increased system pressure caused by the expansion of water.

  DIN 14690 PDF

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.

Please try your search again later. When demand is put upon a potable water system, hot water is drawn from the water heater. Read reviews that mention water heater expansion tank water pressure easy to install hot water relief valve air pressure water heaters gallon water pressure at psi water amtrpl expansion tank installed installation expabsion model check st- plumbing tanks larger. Placed the tank on top of the T, and the cold on the side of the T. Pressure increases until the relief valve opens and the expanded water “spills” from the water heater.