The water heater that was previously installed was a State Select that had developed a leak from the bottom of the tank after 8 years. We installed a 50 gallon AO smith hit water heater with an Amtrol thermal expansion tank. Water pressure tested at over 100 psi even after the expansion tank had been installed. The PRV would start to allow more pressure into the system after initially regulating the water pressure as it was designed to do.
