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Amtrol ST-12 (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-12 Advantages:
(based on 16 reviews)
of respondents would recommend this to a friend.
Reviewed by 16 customers
Displaying reviews 1-10
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(0 of 1 customers found this review helpful)
Comments about THERM-X-TROL ST-12 Expansion Tank:
Works. Precharge was about 60lbs and I did not need to adjust that for my purpose. This is a fairly heavy tank so I mounted it to a wall with a strap to take the weight of it off the piping. Remains to be seen how long it will last...
Bottom Line Yes, I would recommend this to a friend
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I have a 75 gallon residential gas hot water heater that was continuously discharging water from the pressure relief valve (150 lbs). By using the sizing of expansion tanks for this system, I found that the original expansion tank was undersized and not functional. The replacement with the proper sized new expansion tank and following the directions provided by the manufacturer, the the issue was resolved.
Expansion tanks failing ..replaced withAmtrol...Installed a water pressure regulator alsodue to high incoming water pressure from utilitycompany..Great product..Great People..arrived on time
Therm X trol works great
from Cincinnati, OH
Would do business again with this vendor
Reliable, well-made product
By Bend Bill
from Bend, OR
Replaced 10 year old expansion tank and worked well as expected. Installation instructions could be more detailed.
from Austintown, Ohio
Bought this to replace another expansion tank when I changed hot water tanks. Good product, does the job it's suppose to, no problems.
from Pawleys Island, SC
Quick delivery. Easy to remove old item and install new. Instructions were clear!
ST -12 Replacement
By Plumb Krazy
from West suburbs of Chicago
Easy to order ,fast shipper,simple to install!The install is a good coversation topic @ the holidays.Lotsa guys said I didn't know that!!!!
A bit expensive but does the job!
from San Diego, CA
Had to build a tee with a female and two male NPT connectors. I ended up placing it on a shelf horizontally and tied it down with a bracket. Pressure gauge has stayed at 60 psi so far, whereas it used to go up 110 psi overnight.
Product works well - perfect
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