How to Fix an Impeller on a Pool Pump

How to Fix an Impeller on a Pool Pump. If your pool pump’s impeller is broken, your filter will not clean your pool. No matter how often you clean your filter cartridge or replace the sand, without a properly functioning impeller, you might as well turn your filter off. Running a filter with a broken impeller is a waste of electricity and an exercise in frustration. You must fix the impeller to get your pool water clean.

Fix your pump impeller to keep your pool clean.

Things Needed

  • Pliers
  • Screwdriver

Step 1

Shut off the power to the pump. Because the impeller is one of the few moving parts on a pool’s filtration system, it is important to turn off and unplug the pump. Depending on the severity of the impeller problem, you might have to physically remove the pump from the filtration system.

Step 2

Close all open water valves. If you have valves on the hose connections to and from the pool, turn the valves to the off position. This helps prevent water from flowing through the pump and filter while you are repairing the impeller. If you don’t have a shut-off valve, disconnect the hoses from the filter.

Step 3

Clean debris from the impeller. Sometimes the problem isn’t that the impeller is broken, it’s just clogged with leaves. Reach into the tube that connects the pump’s waste basket to the impeller and remove any visible debris.

Step 4

Remove or rotate the pump basket from the motor/impeller assembly to access the impeller. If debris is not the problem, you’ll have to visibly assess the impeller's condition. Removing or rotating the pump basket makes it easier to get to bolts on the discharge port where the impeller is located.

Step 5

Loosen and remove the bolts holding the discharge port together. Once you remove the bolts, check if the impeller is on securely and does not wobble. A properly functioning impeller should rotate evenly like a fan. If the impeller wobbles slightly, it affects the pump's ability to draw the water into the filtration system. If this is the case, you must remove and replace the impeller.

Step 6

Open the back of the pump’s motor to access the nut which serves to hold the impeller in place. You can only reach the nut by entering through the motor’s housing. Hold the nut with a pair of pliers while loosening the screw on the front end of the impeller. Once you loosen the screw, the impeller should come off. Replace the impeller, reassemble the motor and your impeller should work properly.


  • Test the impeller before reassembling the pump. Plug it in to make sure the impeller rotates as it should. Then reassemble the pump and attach it to the filtration system.


  • Pool Pump Diagram