Pump runs but makes a constant gurgling or cavitation noise; bubbles visible under the lid.

Safety First: Turn OFF the pump before adjusting valves or cleaning baskets.

• Open suction valves fully: Ensure all suction valves are fully open to reduce restriction.
• Clean suction sources: Remove debris from skimmer baskets and main drain covers. Ensure water can flow freely.
• Lower pump speed: On variable‑speed Rheem pumps, reduce RPM to a level that maintains flow without cavitation noise.
• Check installation height: If the pump is significantly above water level, consult Rheem installation guidelines; relocating the pump or reconfiguring plumbing may be necessary.
• Inspect for suction leaks: Air leaks can exacerbate cavitation; check lid O‑ring and suction fittings.