Reply To: Thermal Expansion

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Yes, we checked the pressure. Installed a guage before installation of the expansion tank. It runs around 50psig before thermal expansion and then around 70psig after. Of couse, stabling again at 50 after a valve has been open. Looks ok.

I was told by a local supplier that it could have something to do with the volume of water supplied. It’s piped with 3/4″ from the curb stop to the water heater. Another interesting note: the water heater is the last thing in line on the cold water side. He felt that a more than normal volume was rushing past the open line valve causing a “cold water hammer” on the water heater. I don’t believe it has/had anything to do with “normal” thermal expansion. ie. check valve blocking water from expanding thus using T&P.

The more you complain, the slower I work.

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