Customer called in about having low water pressure through out the house after we installed their new water heater and Halo 5. Checked water pressure and water pressure at 120psi. Informed customer that their prv has failed and needs replaced. Also reason for causing low water pressure. Customer approved pricing for us to replace PRV. Went ahead installed new PRV. Also replaced boiler drain as well due to it leaking after being shut off. Checked for leaks and no leaks detected. Cleaned aerators in bathrooms and kitchen faucet.