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๐ง Stay pressure-perfect and leak-free with Watts PLT-12 โ because every drop counts!
The Watts PLT-12 is a 4.5-gallon potable water expansion tank designed to manage thermal expansion in residential and commercial water heating systems. Featuring a durable carbon steel construction with epoxy coating, a 3/4" stainless steel male inlet, and a maximum pressure rating of 150 psi, it ensures safe, balanced water pressure. Certified to meet potable water standards, it installs easily and is compatible with all direct-fired water heaters.









| ASIN | B002JEQGYO |
| Best Sellers Rank | #33,993 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #5 in Hydraulic Tanks & Reservoirs |
| Brand | Watts |
| Brand Name | Watts |
| Capacity | 3.42 gallons |
| Color | Gray |
| Customer Reviews | 4.7 out of 5 stars 450 Reviews |
| Global Trade Identification Number | 00098268095753 |
| Included Components | Watts Potable Water Expansion Tank |
| Item Dimensions W x H | 11.1"W x 14.7"H |
| Item Type Name | Expansion Tank |
| Manufacture Year | 2023 |
| Manufacturer | Wilo |
| Manufacturer Part Number | 67371 |
| Material | Steel |
| Material Type | Steel |
| Model Number | PLT-12 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Power Source | hydraulic_powered |
| Product Dimensions | 11.1"W x 14.7"H |
| Style Name | Potable |
| UPC | 098268095753 |
| Unit Count | 1 Count |
A**E
Great tank
Easy to install, works great. Removing old one requires 2 wrenches. Install requires teflon tape, pipe dope, Indoor/House water pressure gauge, small portable compressor to bring the tank up to ambient house water pressure before installation.
T**H
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.
K**T
Worked Just Fine!
OEM. Worked Just Fine!
R**L
Works
Works
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 donโt 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 didnโt see those details in YouTube. The price on Amazon was the best and the delivery was quick.
A**J
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
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.
S**N
Arrived on time
Arrived on time and was easy to install into the fridge.
P**S
make sure you have built a sturdy base. I don't know why they can't weld ...
I wasn't sure if this would work, we've had banging pipes for a long time. Well... it absolutely eliminated ALL the banging pipes in my house. We have a front loading washing machine and for 8 years we could tell from anywhere in the house that the washing machine was running. Once I installed this expansion tank, my wife had to go back to the laundry room twice to make sure the washer was actually running. Even I couldn't believe it was working so well. So simple to install but make sure you put enough wraps of teflon tape around the joint. I only put three and had to go back and redo it with 8 to stop a minuscule drip. Also, it can be heavy when half filled with water, make sure you have built a sturdy base. I don't know why they can't weld a bracket to hang these from right on the tank?? Highly recommended if you can hear your pipes when the water is moving through the pipes.
D**D
A OK
I haven't installed yet, will update in future if disappointed with product. As of now, appears to be of quality construction and sound design. Received in a very timely manner.
A**Y
good.
so far improved the pressure in the house. Thanks
A**R
It Works As Promised
Delivers as promised in the specs. Check the bladder pressure and adjust if necessary. I used a bike tire pump.
Trustpilot
2 weeks ago
2 weeks ago