Hurlcon Cavitation Due to Restriction or High Suction Lift

Pump is unusually loud with a cavitating, gravelly sound and visible air in the pump lid.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Blocked suction line, Undersized suction plumbing, Pump installed too far above water level, Partially closed valves

Safety: Turn off pump before adjusting valves.

Open all valves: Ensure suction and return valves are fully open.
Clean suction side: Empty skimmer and pump baskets and check for obstructions at suction fittings.
Reduce lift: If the Hurlcon pump is installed significantly above water level, consult a technician about relocating or reconfiguring plumbing.

Persistent cavitation can damage the impeller and volute; address restrictions promptly.

Medium 3/5

Hurlcon pump suction plumbing and impeller

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