Pump makes a loud cavitation or rattling noise and the pump pot is not completely full of water

Safety first: Turn off the pump before adjusting valves or opening the lid.

• Open suction valves fully: Ensure all suction valves feeding the Harris pump are fully open to reduce restriction.
• Clean suction sources: Empty skimmer baskets and clear any visible debris from the main drain.
• Lower suction lift if possible: If the pump is installed significantly above the pool water level, consider relocating it closer or lowering it to reduce suction lift.
• Check for obstructions in suction line: If cavitation persists, have the suction line inspected for blockages or undersized piping.

Prolonged cavitation can damage the impeller and volute; correct the cause promptly.