Sta-Rite Worn or Damaged Diffuser

Sta-Rite pool pump diffuser shows signs of wear and the pump has difficulty priming or maintaining pressure.

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.

Possible Causes

Abrasive debris in water, Cavitation erosion, Age-related plastic degradation

Safety: Turn off power and close valves before disassembling the pump.

Inspect diffuser: Remove the Sta-Rite pump housing and examine the diffuser for cracks, missing pieces, or worn sealing surfaces.
Check diffuser O-ring: Replace any flattened or damaged O-ring that seals the diffuser to the housing.
Replace diffuser: Install a new Sta-Rite diffuser matched to your pump model. Ensure it seats properly over the impeller.
Reassemble and test: Reassemble the pump, prime it, and verify improved priming and pressure.

Medium 3/5

Sta-Rite pump diffuser

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