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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Whoever ships this, be more careful. ComiXology Thousands of Digital Comics. With modern plumbing codes mandating backflow prevention, thermal expansion can cause pressure buildup in domestic water systems.

Intalled new water heater and the thermal pressure regulator leaked about 16 oz. Have one to sell? No National Stock Number Pages with related products. These items are shipped from and sold by different sellers. 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 or higher depending upon the requirements of your system.

Roll over image to zoom in. See all Used offers. When I called GE about the problem, I was asked if I had a water pressure regulator and expansion tank. Item will come in original packaging. Specifications Expansion Tank Type. Don’t see what you’re looking for?


See all 56 reviews. Our water pressure stays around 85psi.

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 provide customer service for these products. Something we hope you’ll especially enjoy: I even left the water pressure meter installed and tracked the peaks.

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Please call us for a suitable alternate product. I upgraded from a 2 gallon to 5 gallon units. As the system water temperature reaches its maximum, the diaphragm flexes against the air cushion to allow for the increased water expansion. Amazon Second Chance Pass it on, trade it in, give it a second life.

A quality tank, except for the dent. The product works great, I installed it a couple weeks back and it has held my water system pressure steady at 70 psi ever since. Thank you for your feedback. I don’t have much experience with plumbing repair but as a DIY project this was not bad at all.


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Six months after install and I start hearing water hammer. There was a problem filtering reviews right now.

Amtrol ST Therm-X-Trol Thermal Expansion Tank

Pressurized properly before install. When demand is put upon a potable water system, hot water is drawn from the water heater. Either your browser does not support JavaScript, or it has been disabled. Sold by Amazon Warehouse. Amazon Restaurants Food delivery from local restaurants. Amazon Giveaway allows you to run promotional giveaways in order to create buzz, reward your audience, and attract new followers and customers.

Plain steel and bladder-type. This “spillage” results in wasted BTU’s and a potential safety hazard for the homeowner. Overall track record for these seems good, so I guess I got the exception. Image Unavailable Image not available for Color: