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Your cart is empty.Use the Watts series ET water expansion tank in tandem with your hot water heater to absorb increased water volume resulting from hot water boiler heating and keep system pressure below the relief setting. Use in closed-loop, non potable water heating systems. Durable steel tank with 60 psi maximum working pressure.
W****** D*****
Reviewed in the United States on March 8, 2025
Perfect Fit and replacement. Purchased the EXT-30 to replace my failed Flextrol expansion tank purchased 12/2020. Apparently the bladder failed, causing my hydronic heating system to increase pressure causing the pressure pop off valve to drip. The old tank was small, 2.1 gallon size. When researching replacements, I accidently ordered the 4.5 gallon. Thankfully it just barely fit. I have three zones and fingers crossed the larger capacity will endure less stress during the repeating thermo cycling. Watts tank is well built, came pre charged at 12 psi. Spun right on 1/2 mnpt connection. Ordered on Monday, delivered Wednesday and 30 minutes later was installed. Pressures have maintained, no leaks, and zero worries. Btw, I called the plumbing supply store where I purchased the Flextrol in 2020, I believe it was less than 100 bucks, wanted a whopping $150.
Lester A. Bartel, Jr.
Reviewed in the United States on March 24, 2025
Item was as represented.
Jeffrey
Reviewed in the United States on March 12, 2025
Fit right up replacing a old unit. I'd say average homw handyman job. Solved my overpressure issue on boiler!
brigitte
Reviewed in Canada on February 19, 2024
juste ce qui me falais
Marine One
Reviewed in the United States on December 16, 2024
Simple to hang and quality shows.Strongly recommend. A great replacement for your Boiler System.
Wmatkinson
Reviewed in the United States on October 22, 2024
Symptoms are drip from pressure relief tube. Thud when tank tapped…full of water no air. Bladder fails. I get 4 to 5 years with side mounted and hard water
Kaps
Reviewed in Canada on December 23, 2023
Worked perfectly.
Jacques Lafereniere
Reviewed in Canada on December 6, 2022
gOOD SERVICES
Byungsoo min
Reviewed in Canada on June 18, 2021
TerribleI hope I delete my account.Nobody are responsible system.
Customer
Reviewed in Canada on May 15, 2021
Item replaced original. Works great.
Neil
Reviewed in Canada on November 12, 2020
very quick shipping installed easy works great
Jon
Reviewed in Canada on March 4, 2018
Good quality tank from Watts. It was well built and welds on tank all looked good, threading was clean and opening was protected with a temporary plug from manufacturer. I have only recently added tank to my system so I cannot attest to longevity of the product as mentioned in other reviews however I will post update in the future. I have purchased items from Watts in the past and have always been satisfied with the quality.
D Lacroix
Reviewed in Canada on February 14, 2018
Had to pre-load to right pressure first with a regular bicycle pump. Easy to install.
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