Sta-Rite pool pump runs but makes a loud rattling or clattering noise from the wet end.

Safety: Turn off the pump and close valves before opening the housing.

• Check water level and valves: Ensure pool water level is adequate and all suction valves are fully open.
• Inspect for air leaks: Examine the Sta-Rite pump lid, unions, and suction fittings for air leaks that can cause cavitation. Repair as needed.
• Clean impeller: Remove the pump housing and inspect the impeller for stones, twigs, or other debris. Clean thoroughly and ensure all vanes are intact.
• Reassemble and test: Reassemble the pump, prime it, and run it. If rattling persists, the impeller or diffuser may be damaged and should be replaced.