WATTS WATER TECHNOLOGIES GIDDS-1030402 Watts Potable Water Expansion Tank, Model #Plt-12, Stainless Steel Nipple, 4.5 Gallon, Lead Free - 1030402

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.

OEM. Worked Just Fine!

This tank is easy to install fits perfect on my water heater

Exact fit

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.

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.

It did not leak, it had a dent in it and I installed it anyway, the functionality is of this product is essential for the boiler is essential