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Amtrol ST-5 (Therm-X-Trol) is a water heater expansion tank, designed for use in domestic hot water heating systems to eliminate the potential hazards of water expansion. Water heater expansion tank is commonly installed in a domestic hot water system that contains a backflow preventer, a check valve or a pressure reducing valve.
Amtrol ST-5 Advantages:
(based on 28 reviews)
of respondents would recommend this to a friend.
Reviewed by 28 customers
Displaying reviews 1-10
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Works as advertised, good quality
from Gunnison, CO
Comments about THERM-X-TROL ST-5 Expansion Tank:
As I understand, this is the version of the Amtrol 2-gallon tank that is made in the US. The quality seems good and I had no problems with it. My new water heater used to leak from the pressure relief valve, now it doesn't. I mounted it horizontally. There are brief instructions. What they don't tell you anywhere is that the plumbing connection is 3/4" male pipe thread. I reduced that to 1/2" and then used a 1/2" pex adapter.I used a floor-type bicycle pump to pressurized to my water pressure (80 psi). It's a little difficult when the pump is upside down, but doable.
Bottom Line Yes, I would recommend this to a friend
Images shared by Jim
Mounted on floor joist with tank horizontal, using
Tags: Picture of Product, Using Product
Tags: Using Product, Picture of Product
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Perfect replacement part
from Eldersburg, MD
The expansion tank on my gas hot water system had developed a leak from corrosion and had also failed internally, being many years old, and was causing the relief valve to release water periodically. Found this one and it was a perfect fit and an exact replacement part. Easy to install by just using some Teflon tape and it threaded right in until tight and no drips. Ordering was easy and it arrived promptly. Now the system is a-ok and the relief valve dry. Working great.
(0 of 1 customers found this review helpful)
Way more bang for the buck"
By Handy Dandy
from Williamsburg, Virginia
well defined, simplexity at it's best.
Produt seems of good quality. Fast and undamaged shipping.
A product you can trust.
from Philadelphia, PA
My old expansion tank broke.
THERM-X-TROL ST-5 Expansion Tank by Amtr
By GARY D
from SARASOTA, FL
Pex shipped right away, the part arrived in 3 days regular shipping and the remodel project got done on schedule.THANKS PEX!
No More Pressure Surges
from Atlanta, GA
Works great, and the support bracket is a must. Used a battery operated air pump to pump tank to 50 psi to match line pressure. Packaged nicely, and arrived quickly. Thanks Pex Supply.
Images shared by Clint
"I would buy this product again
Works great, no more hammering when washer shuts off!
Good Price Fast Shipping
from Raleigh NC
This unit had 40 psi air pressure standard from the manufacturer (as specified). I increased to 60 psi to match the static water pressure in my home. When replacing your expansion tank, evaluate the mounting. I used 2 large stainless hose clamps around the tank, attached to a 2x4.
2 gallon expansion tank
By Ed the plummer
from Delaware Ohio
Exact match of the original tank I replaced.I think 6 years is a short lifespan for this tank.
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