Average Reviews:
(More customer reviews)When I purchased the Water Worker G-5 Thermal Expansion Tank in Nov 2009, I did so even though I had read somewhere another buyer had experienced a failure in the unit's bladder. Well, mine failed too. Today (April 2011) I found the pressure stem valve spewing water (bad news). I am guessing the bladder failed about a year ago (6 months after the installation) based on my recollection of how my water system performed (water heater relief valve activating). I do not see any guarantee information on the installation manual and cannot find anything online about a guarantee.
Update - June 2011 - As it turns out the unit had a 5-yr guarantee, which was honored without question. I used the refund to buy a larger unit and now believe the G-5 unit was too small for my water heater. Everything is working fine. This includes no water heater pressure release valve openings.
Important note: this manufacturer recommends larger expansion tank size than do many tables found on the INTERNET. Paying attention to the water heater size recommendations on the box can help you avoid a lot of trouble.
I changed my rating from 1 to 4 stars based on the hassle-free replacement and because the G-5 failure was probably caused by my increase in water heater tank size: not a defect in the product.
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