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Eastman

Eastman Thermal Expansion Tank, 2 Gallon, 3/4 MPT, for 30 to 50 Gallon Water Heater Tanks, Steel, 60022

Based on 703 reviews
Condition: New
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$34.97
Save $415.02 was $449.99

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Availability: In Stock.
Fulfilled by RWC-USA
Arrives Sunday, Nov 8
Order within 15 hours and 7 minutes

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At a glance

Condition
New
Size
2 Gal.
Capacity
2 gal
Weight
5.2 lb
Color
White
Material
Alloy Steel
Power Source
Battery Powered
In the box
2 GALLON EXPANSION TANK

Features 7

  • alloy steel
  • Made in the USA
  • RELIABLE PROTECTION: Eastman thermal expansion tanks are designed with quality to prevent hot water from backflowing into the cold water line, they also avoid pressure build-ups that can be dangerous for your water heater
  • DESIGN: This 2-gallon thermal expansion tank has a dimension of 12. 4-inches x 8. 3-inches and it's indicated for use in water heaters and boilers with a capacity of 30-gallons to 50-gallons

Description

This Thermal Expansion Tank prevents hot water from back flowing into the cold water line. This tank also prevents hot water from escaping through the pressure relief valve and onto the floor. The thermal expansion tank prevents constant fluctuations in water pressure

Specs 23

Power Source Battery Powered
Special Features Thermal Expansion
Maximum Temperature 210 °F
Mount Type Wall
Maximum Pressure 150 psi
Capacity 2 gallons
Item Dimensions W x H 8.3"W x 12.4"H
Item Weight 5.2 pounds

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Nov 8

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

Nice price and easy to use/install.
Size: 2 Gal.
Easy to install based on my plumbing. I installed upside down on the cold water inlet to my tankless. Charged it to the incoming static water pressure (65psi). Turned the water on and now when I turn on my cold water in the kitchen in the morning, it is no longer warm. Two+ years later, I installed a 2 gal POU water heater for my whole-house humidifier since the humidifier wouldn't activate the whole house (a good thing). Noticed the cold water from the kitchen faucet getting warm again. Checked the expansion tank pressure and it was low so I recharged to 65 psi. ... show more
Reviewed in the United States on November 1, 2025 by J. Reid
Seems to be a good tank, required today so far, so good.
Size: 2 Gal.
Well, so far so good. Installed this in top of our new hot water tank, with a bronze tee swivel fitting. The tee supports the tank vertically on top and water inlet in the side. I insulated the exterior with aluminum backed foil bubble insulation, because my hot water tank is in the dumbest place in our home, the attic...Builders, don't do this! The tank had 40lbs of air already which I had to pump up to our water pressure to match. The tank instructions say to change the tank every 5 years, which leaves me a bit pensive on durability, so I'll keep an eye out on it as I've never had to use a tank like this before. But installation was easy, I recommend using Teflon tape and pipe dope for a good leak free install. So far so good. ... show more
Reviewed in the United States on October 14, 2026 by Jamesisit
Can't beat the price
Size: 2 Gal.
Worked well and very well built
Reviewed in the United States on March 19, 2026 by Edward
Great product
Size: 2 Gal.
Excellent works great
Reviewed in the United States on July 30, 2026 by Terry
Easy to install, currently doing its job
Size: 2 Gal.
This is our first thermal expansion tank (TET, necessitated by the installation of a code required pressure reduction valve as water enters our home. This caused the thermal expansion of the water in our home closed water system's hot water heater's storage tank. This TET has been installed at our house for few weeks now and it seems to be working as advertised. If/when we start having problems with it (est. 6 years before it might need to be replaced) will update this review. Oh, we also bought the Eastman bracket kit. It worked fine with this tank with the water connector hooked at the bottom and the tank mounted vertically. We also purchased the Eastman 3/4" SS braided connection hose and it looks good in our water closet. ... show more
Reviewed in the United States on April 25, 2021 by Amazon Customer
saved a bunch
Size: 2 Gal.
Arrived early was exactly as advertised
Reviewed in the United States on April 4, 2026 by jester
So Far So Good
Size: 2 Gal.
I should note that the first one sent was damaged (dented) in shipping. Not damaged in shipping to me, but apparently these are shipped at some point without the protective outer shipping box. The regular product box inside the Amazon box was all ripped and tank dented. I then saw the damaged box had a shipping label addressed to the warehouse. It should not have then been packed and sent to a customer. Anyway, I won't reduce the product rating because of something like that. The replacement is working fine so far. I tested pressure and added a little more to 50 PSI with basic bike tire foot pump. Install was easy, because I was able to simply screw it into an unused backyard spigot/bib location in a secluded and hidden location on the back of the house. (These only need to be placed/connected to the house plumbing, after the reducer.) Before install, my 50 PSI house pressure was going up to 130 PSI when the water was being heated and until water was turned on after to relieve it. (The water heater would make knocking sounds when this pressure was relieved.) Now, with this tank installed it only gets to 52 PSI through the whole heating phase. If anyone gets an abnormal gush of water sometimes when they turn on the water in the house, they likely have this thermal expansion and need a tank like this. ... show more
Reviewed in the United States on October 30, 2018 by Ronnie
Good but not returnable.
Size: 2 Gal.
Good item but not returnable.
Reviewed in the United States on June 27, 2026 by Quasi Modo
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