I was getting drips from TP valve on WH. I checked house pressure 60psi. Checked expansion tank, also 60. Hot water temp 120.
I replaced TP valve. Lots of sediment in tank in TP valve (8 years old). When tank was reheating the TP valve was dripping more than old one. Checked pressure on outside spigot while WH was heating up. 140F. Turned down temp and opened hot water spigot and pressure dropped back to 60psi.
Rechecked expansion tank with no pressure in water system, 60psi. What is problem?
Why won't the expansion tank control the thermal expansion from WH? Can sediment build up in WH cause this? Is expansion tank top small? Plan to replace WH soon but would like to figure out what is happening first.
Thanks
I replaced TP valve. Lots of sediment in tank in TP valve (8 years old). When tank was reheating the TP valve was dripping more than old one. Checked pressure on outside spigot while WH was heating up. 140F. Turned down temp and opened hot water spigot and pressure dropped back to 60psi.
Rechecked expansion tank with no pressure in water system, 60psi. What is problem?
Why won't the expansion tank control the thermal expansion from WH? Can sediment build up in WH cause this? Is expansion tank top small? Plan to replace WH soon but would like to figure out what is happening first.
Thanks
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