Arrived on site for low/high water pressure concerns. Inspected the main water line and found a failing pressure reducing valve (PRV) and inaccurate pressure gauge. Shut off water supply, removed the old PRV and gauge, and installed a new pressure reducing valve along with a new pressure gauge on the main water line. Set system pressure to manufacturer-recommended PSI and tested for leaks. Restored water service and confirmed proper water pressure throughout the home.