Upon arrival I was shown to a leaking pressure regulator. I tested the pressure and got 65 psi and once I conducted a thermal expansion test by getting the water heater to fire up with a gauge on the system, the pressure rose to 90psi. This indicates that the thermal expansion tank has failed. Upon approval, we replaced the leaking pressure regulator with a Watts AUB 25 I’m leaving an estimate for replacement of the thermal expansion tank. Tested everything for leaks and proper function.