1dragonlady
New Member
I had my water pressure reducing valve replaced yesterday. It's located about 12" above the main water shut of valve, about 3 feet above the PRV is a water pressure gauge. The PRV is factory set at 50psi.
Everything seemed fine for a few hours, however, the water pressure was at 70 psi when I checked it this morning @8am (after I took my hot shower). Further investigation indicated that the pressure at the thermal tank by the hot water heater was 38 psi (the tank and the hot water heater were replaced in June 2008). I added air into the expansion tank to 58 psi. When I left the house @9 am the water pressure gauge that is above the PRV said 58 psi, same as the amount of pressure in the expansion tank.
8 hours later when I got home from work the water pressure gauge says 70 psi, I checked the pressure at the expansion tank and it says 56 psi.
I can't understand why my water pressure doesn't stay at 58 psi and don't know what caused it to go up to 70 psi. Please help.
Everything seemed fine for a few hours, however, the water pressure was at 70 psi when I checked it this morning @8am (after I took my hot shower). Further investigation indicated that the pressure at the thermal tank by the hot water heater was 38 psi (the tank and the hot water heater were replaced in June 2008). I added air into the expansion tank to 58 psi. When I left the house @9 am the water pressure gauge that is above the PRV said 58 psi, same as the amount of pressure in the expansion tank.
8 hours later when I got home from work the water pressure gauge says 70 psi, I checked the pressure at the expansion tank and it says 56 psi.
I can't understand why my water pressure doesn't stay at 58 psi and don't know what caused it to go up to 70 psi. Please help.
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