ETX-90 6-Gallon Non- Potable Expansion Tank for Closed-Loop Systems

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.

Easy to install. Better pricing than from the Big Box store. Good quality.

This is a great replacement for my old expansion tank. The old tank worked for at least 16 years until the bladder split. This one is a direct-fit replacement and now my boiler heat system is back up and running.

Bladder in the existing one broke down after many years, this was an easy replacement. Now the loop pressure remains reasonably constant, important to prevent damage to pipes.

Item was as represented.

Exact fit

Works as expected on my 30 psi boiler system.

I was so happy that I found this on Amazon. My heater broke down in the dead of winter because the original tank had a whole in it and as leaking water. My mechanic told me what I needed and I found it on Amazon. It looks like it is made better than the original tank, which was only about 2 years old. So I’m praying that this one lasts longer. Great value for the money. The tanks in the stores cost more than this one did.

À été très utile

Item replaced original. Works great.

Worked perfectly.

juste ce qui me falais

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.