Emaux
Cavitation Due to Suction Restriction or High Lift
Pump emits a loud cavitation noise (like gravel or crackling) and the pump basket shows swirling air bubbles.
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Safety Warning
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.
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Possible Causes
Suction line undersized or partially blocked, Pump installed too far above water level, Suction valves partially closed
How to Fix / Troubleshooting
Safety first: Turn off the pump before adjusting valves.
- Open valves fully: Ensure all suction valves feeding the Emaux pump are fully open.
- Clean suction path: Remove and clean skimmer and pump baskets. Check for obstructions at suction inlets.
- Reduce suction lift: If possible, lower the pump closer to water level or reduce the number of elbows and restrictions on the suction line.
- Check for air leaks: Inspect lid O‑ring and suction unions for air ingress, which can worsen cavitation.
Long-term cavitation can damage the impeller and housing; if noise persists, consult a pool professional to review the hydraulic design.
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Repair Difficulty
Medium
3/5
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