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Protect your water heater from Thermal Expansion -4.5 Gallon
Water expands in volume as its temperature rises. The extra volume caused by thermal expansion must go somewhere. A thermal expansion tank added to your home water system offered the solution to this dilemma.
Thermal Expansion Tank - 4.5 Gallon
Product Specifications
- Size：13inx8.5inx8.5in
- Capacity:4.5GAL
- Connection Size:3/4"MPT
- Max. operating temperature: 200°F
- Max. working pressure ：150 PSI
thermal expansion tank provides increased safety
Water expands when heated
A 50 gallon tank of cold water becomes about 52 gallons or more when the water is hot.When the water expands now, it has no place to go. Which greatly increases the pressure in the water pipes, damaging plumbing, appliances, and water heaters.
Extended Equipment Lifespan
Minimizes the impact of pressure changes on pipes, pumps, valves, and other equipment.
Bud R.
August 24, 2025
This produce has a durable finish and is good for outdoor applications. Work just as described.
good or not
July 31, 2025
High quality tank and fittings. Spin on install with slight wrench pressure to stop my Superstore water tank from overcoming the blow off-valve. Last tank - different brand - lasted 10 years. This one looks more rugged.
Gabby
July 26, 2025
Was quoted 350 dollars to replace by plumber. Ordered from Amazon, watched 3 hours on U-tube on how to install it and did it myself. Total cost $55.
Lori A Alsdorf
July 18, 2025
This expansion tank was an easy replacement for one that was waterlogged causing the pressure relief valve to weep most of the time. Two wrenches and thread tape was all I needed for the exchange, but that was after I tested the water pressure and pre-charged the tank to the actual pressure + 4 psi. It’s working fine and I picked it due to its 2-year warranty compared to others with just 1-year.After completing the install I noticed what I hope is a misspelling on the tank label which reads “portable†instead of potable in the Amazon description. That’s just one clue that it’s manufactured in China.
J2021g
May 13, 2025
Does the job. Will see about longevity, only a few days old now. No instructions on filling air, came with 23 pounds pressure. Best I can tell is before installing, fill air within a few pounds of home pressure. It was 50 pounds in my case.
L. Sloan
March 7, 2025
A great replacement tank.After getting a plumber's bid for the removal of the old tank and replacement of a new tank - plumber's quoted me $350.00. I decided to tackle the job my self - very easy! Toughest part of the job - old tank removal (basically -loosened the old connection with WD-40 with a few light taps on the connection point - the unit was unthreaded and removed). Installed the new unit with no issues - make sure to check the air pressure of the new tank and fill with air as described within the included manufacturer's instructions. Again - very simple.
Donald Doucette
February 27, 2025
It works no issues
joshua
January 29, 2025
Good
Customer
December 28, 2024
All new plumbing in reno so added one inline. So far no issues. Good price. Pressure good so no worries. Easy to add into system
Monveli
December 18, 2024
Funciona
Earl Savoie
December 10, 2024
Everything good the driver followed the directions
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