If you have borrowed a power washer and have discovered it leaks, don't get frustrated or surprised. Power washer leaks are common. A few specific areas on a power washer unit are more prone to water leaks. It is important to fix power washer leaks, too. Not fixing them results in loss of pressure in the system, additional costs for water and water runoff where it may be unwanted on the job.

Step 1

Take apart the pressure washer trigger gun and its wand or lance. Place the pressure washer gun wand or lance into a tabletop vise grip, so that you have easy access to the quick-connect nozzle at the end of the wand.

Step 2

Use a 2.0-mm flathead screwdriver or ice pick to stick and remove the O-ring from the quick-connect nozzle at the end of a gun wand or lance. Use straight long nose needlenose pliers to pull the O-ring out of the quick-connect nozzle if you were not able to do so with only the flathead screwdriver or ice pick.

Step 3

Push a new O-ring into the center of the pressure washer quick-connect nozzle with the flathead screwdriver, so as to get one part of it into the groove recess in which it functions. Push the rest of the O-ring into place by carefully using the flathead screwdriver to do so.

Step 4

Put the end of the pressure washer hose into the tabletop vise grip, so as to have easy access to the quick-connect female plug at its end. Stabilize the pressure washer hose if you don't have access to a tabletop vise grip.

Step 5

Use a 2.0-mm flathead screwdriver or ice pick to stick and remove the O-ring from the quick-connect female plug on the water pressure hose. Use straight long nose needlenose pliers to pull the O-ring out of the quick-connect female plug on the water pressure hose, if you were not able to do so with only the flathead screwdriver.

Step 6

Push a new O-ring into the center of the quick-connect female plug on the power washer hose with the flathead screwdriver, so as to get one part of it into the recessed grooved in which it functions. Push the rest of the O-ring into place by carefully working it into place, one part of the O-ring at a time.