Customer had high pressure in home. The prv was leaking and the thermal expansion tank had failed and was undersized. Customer requested quote for a new water heater due to the age. Replaced water heater and installed a new 75 gallon gas water heater, with a new pan, large thermal expansion tank, and shutoff valve. Replaced the prv and whole home shutoff with a more readily accessible shutoff. Tested all work to ensure proper function and no leaks.