How Do You Install a Water Pump Pressure Switch?

To install a water pump pressure switch, turn off the power and remove the switch, attach the new switch and replace the pressure gauge. Collect all necessary tools before beginning the project.

A faulty water pump pressure switch can cause several problems, including turning on erratically or remaining on. To diagnose the issue, tap the switch with the handle of a screwdriver, and if the pump turns on unexpectedly, the pressure switch needs to be replaced. Ensure the new switch has the same rating as the original switch. To replace the water pump pressure switch:

Step 1: Collect the tools.

This project requires:

  • 4-in-1 screwdriver
  • Adjustable wrench
  • Pipe wrench
  • Pliers
  • Non-contact voltage tester

Step 2: Turn off the power.

Ensure the power to the pump is turned off at the breaker box. Use the non-contact voltage tester to test the power before starting work.

Step 3: Disassemble the switch.

Attach tape to label each wire first, and then pull out the wires and conduit located behind the conduit locking ring.

Step 3: Remove the old switch.

Unscrew and remove both the old switch and the attached nipple. Screw on the new switch and 1/4-inch by 6-inch galvanized nipple.

Step 4: Remove the pressure gauge.

Remove the old pressure gauge and replace with the new unit. Carefully screw on the pressure gauge without over-tightening.