The water pump impeller is positioned between the motor and the pump housing and is designed to draw water through the pump in order to filter the water. Occasionally, the impeller can be damaged by debris getting wedged between the impeller blades and the pump housing. The black plastic impeller can be repaired with just a few common household tools. The most cost effective way to repair the impeller is to simply replace the part.
Things You'll Need
- Socket wrench set
Unplug the power cord of the water pump from the electrical outlet and set the device on a flat surface to repair the impeller. Unfasten the two screws that secure the cover plate to the motor with a screwdriver.
Unfasten the four bolts that connect the motor to the pump housing with a socket wrench. Pull the motor off the housing and take the plastic diffuser cover off the end of the motor by hand that fits inside the pump housing.
Hold the back of the motor by hand to prevent the shaft from turning while you are removing the impeller and turn the impeller blade on the other end of the motor by hand counterclockwise to remove the part from the motor.
Remove the impeller from the motor and discard the device. Attach the new impeller to the motor shaft by holding the back of the motor shaft and screwing the new impeller clockwise onto the motor shaft.
Place the diffuser over the impeller and set the end of the motor against the pump housing. Fasten the motor to the pump housing with bolts.
Attach the cover plate to the motor with screws and move the water pump back into place. Plug the power cord of the water pump into the power source.
Tips & Warnings
- To avoid electric shock, always unplug the power cord of the water pump before attempting to repair the impeller.