How to install a pressure washer check valve kit

Disconnect the spark plug wire from the spark plug.

Remove the gas cap.

To prevent fuel from leaking from the tank, place a plastic bag over the mouth of the tank and then reinstall the gas cap.

Remove the inlet water hose and the outlet nozzle hose connection from the pump.

Use a wrench to remove the caps from the check valves on the side of the pump manifold.

Insert a sheet metal screw into the plastic body of the check valve and screw it down so it grips the check valve body, and then pull the screw and check valve body out of the pump.

Use a mechanic’s pick to remove any residue left by the valve body or seals out of the pump body.

Repeat the process to remove all the check valves.

Insert the new check valves into the body of the pump.

Press the check valves down so that they seat properly.

Place a small amount of thread-locking adhesive on the check valve cap threads.

Reinstall the check valve caps and tighten them securely.

If fluid is in the chemical injection tube, clamp the tube off.

Pull the chemical injection tube off the chemical injection inlet valve on the pump manifold.

Tip the pressure washer to access the bottom of the pump.

Remove the 3 Allen-head screws that secure the manifold to the pump.

Pull the manifold off of the pump.

Set the manifold down on a stable work surface.

Remove the water seals from the top of the check valves.

Insert a sheet metal screw into the plastic body of the check valve and screw it down so that it grips the check valve body.

Pull the screw and check valve body out of the pump.

Use a mechanic’s pick to remove any residue left by the valve body or seals out of the pump body.

Repeat the process to remove all of the check valves.

Insert the new check valves into the body of the pump.

Press the check valves down so that they seat properly.

Install the water seals at the top of the check valves.

Position the manifold on the pump and replace the mounting screws.

Tilt the pressure washer upright.

Reinstall the chemical injection tube on the chemical injection inlet valve on the manifold. Remove the clamp from the chemical injection tube.

Remove the gas cap, the plastic bag from the mouth of the gas tank and reinstall the gas cap.

Reattach the spark plug wire.

Run the pressure washer and check for leaks. Check for proper pressure at the nozzle.