Pump is noisy with a rattling or grinding sound from the wet end

Safety: Shut off power and close suction and return valves before disassembling the pump.

• Disassemble wet end: Remove the Sta‑Rite pump housing clamp or bolts and separate the motor/impeller assembly from the volute.
• Inspect impeller: Look for cracked or missing vanes, or signs of rubbing on the diffuser. Remove any foreign objects.
• Check diffuser: Ensure the diffuser is not cracked and that all mounting screws are tight. Replace if warped or broken.
• Replace damaged parts: Install a new impeller and/or diffuser if any damage is found. Use OEM Sta‑Rite parts matched to your model and horsepower.
• Reassemble with new gaskets: Replace the housing o‑ring and lubricate with silicone lube before reassembly to prevent leaks.