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💧 Stay ahead of pressure spikes with Watts – where water safety meets smart design!
The Watts PLT-35 Potable Water Expansion Tank is a 14-gallon, field-adjustable steel tank designed to absorb thermal expansion in residential water heaters. Pre-charged at 20 PSI and rated for up to 150 PSI, it features a copper-lined steel body with FDA-approved polypropylene liner and Butyl rubber diaphragm to prevent air-to-water contact, ensuring durability and system longevity. Certified to IAPMO and ANSI/NSF 61 standards, it maintains balanced water pressure to protect your plumbing system and prevent pressure relief valve activation.
| Customer Reviews | 4.6 out of 5 stars 439 Reviews |
K**T
Worked Just Fine!
OEM. Worked Just Fine!
B**D
Prevents pressure relief valve from firing
We got our pressure valve fixed and so had to install this to prevent the pressure relief valve from going off on the heater. This was easy to install and has clear instructions: 1: pump to the same pressure as the water pressure 2: install (no need to support it) It's pretty small so make sure to size it appropriately. We have had zero issue and everything is working just fine.
C**G
Good quality Tank- paint and threads.
The tank arrived on time and in good condition. Installation was easy. The tank paint and threads were all good quality. It was installed to reduce water pressure changes on my hot water tank. The pressure relief valve was periodically leaking and the expansion tank resolved the problem.
A**R
Is well made
Is good tank well made
X**X
Clod water tank
Stores by me do not carry expansion tanks for the cold side of a water tank. Ones the water company put a check valve on the water supplies going into my house the pipes were banging this solved my problem
B**T
Good Product and Value
Solid, well-made product. Works perfectly with pressure properly set. A good value from Amazon/Plumbersstock at $33.45 shipped. TIP: If a pressure regulator (or other spring or energy-storing element) is present, put a snubber or throttle valve in the tank branch to stop water hammer. Planning ahead for this will prevent disassembly later, as you're thinking 'Hey, that groaning vibration is what that guy was talking about'. Ya, it's not like the SLAM-SLAM-SLAM of older systems, but it's still hammer and can cause problems long-term. Flow rate to/from these tanks is typically very low so a small opening works.
S**X
Lasted 13 years, so bought the same
I had to replace my water expansion tank since it had corroded. I bought this, the same make and model as existing one, since it lasted 13 years. Though guys on YouTube show the replacement is easy, I don’t have power and strength like theirs, so I had used plumbing service to do the installation. I am glad I did because there are more technicalities like increasing pressure of the tank to match home water pressure before installation. I didn’t see those details in YouTube. The price on Amazon was the best and the delivery was quick.
J**D
Good Tank
Was blowing pipes in my house ever since the city worked on my water shutoff valve. Found out my 60 psi was going up to 145 psi after the water heater cut off since I have a check valve on the city line now. After this tank was installed we peak at about 70 psi now which is a major improvement. My tank arrived dinged which is a bummer but doesnt affect operation.
Trustpilot
2 months ago
4 days ago