A well pump uses a pressure-activated regulator to maintain water pressure. The regulator operates within a factory-specified range, activating the pump as pressure drops and stopping the pump when the pressure rises to a set level. You can make minor adjustments to the pressure regulator with a nut driver. Adjusting the pressure regulator is easy and should only take a couple of minutes.
Turn off the breaker that powers the well pump. Turn the nut on top of the regulator cover counterclockwise to remove it. Pull the cover off the regulator and set the cover aside.
Locate the large nut and spring on the regulator. Turn the nut clockwise with a nut driver to raise the total range of pressure provided by the regulator.
Turn the nut counterclockwise with a nut driver to reduce the total range of pressure provided by the regulator.
Locate the small nut and spring on the regulator. Turn the nut clockwise with a nut driver to reduce the difference between the "cut in" and "cut out" pressures.
Turn the nut counterclockwise to increase the difference.
Put the regulator cover on the regulator, place the nut on the threaded rod and tighten it with a nut driver.
Make small adjustments to the pressure and check the pressure after each adjustment. Turning the large nut changes the overall range higher or lower.
A regulator that operates in a range from 50 to 70 psi may operate at 60 to 80 psi if the nut is turned clockwise or 40 to 60 psi if it's turned counterclockwise. Turning the small nut widens or narrows the total operating range.
A regulator that operates at 50 to 70 psi may operate at 55 to 65 psi if the nut is turned clockwise or 45 to 75 psi if it's turned counterclockwise.
Never attempt to adjust the regulator while the power to the pump is on. Don't adjust the regulator outside of the rated range of the pump and associated equipment.