Originally Posted by
Aaron Miller
This one's got me and I need help. New house, two new gas water heaters. There is a pressure regulator on the system. There is also an expansion tank on the system. The TPR valves leaked. They have been replaced twice now and still leak. What's the problem?
Thanks,
Aaron
At a minimum you would have to know what the pressure is in the system.
I suppose it's possible to have bad TPRs but not likely.
The expansion tank could be water logged and rendered ineffective.
If it were mine I would put a pressure gage on the tank drain valve and monitor while the heater is cycling.
One other thought. Is the mineral content high in the water? Accumulation of Calcium deposits can cause the TPR to stick.