3. Adjusting a pressure regulating valve (PRV)
Once the household pressure has been determined, you may be able to adjust it up or down using your PRV (pictured below.) The PRV is normally located in the basement, where your water shut offs are located. The PRV is a bell shaped fixture with a lock nut and bolt on the end. Using a flat head screwdriver and a wrench, loosen the lock nut by turning it counter clockwise with a wrench. Do this before adjusting the pressure, which will allow you to maneuver the bolt. Turn the screw clockwise to tighten or increase the pressure, or counter clockwise to loosen lower the pressure. After each full turn of the screw, take a new reading at your outside faucet. This will ensure you are not adjusting the pressure too high or too low.
Remember to count the turns, in case you want to reset the PRV to its original position. The pressure should not be adjusted above 75psi. Once you have reached the desired water pressure, make sure you re-tighten the lock nut on the PRV.