Pump makes a loud whining or high-pitched noise but still moves water.

Safety First: Unplug the pump before adjusting plumbing components.

• Open valves fully: Ensure any suction and return valves are fully open to reduce restriction.
• Remove obstructions: Clean skimmer baskets, intake screens, and filter cartridges.
• Fix air leaks: Tighten suction hose clamps and service the pump lid O-ring to eliminate air ingestion.
• Check hose routing: Avoid sharp bends and kinks in hoses that can cause turbulence and noise.