Pentair Impeller Washer | CSPH/CCSPH Series Commercial Pump | 38917-0203

The Pentair 38917-0203 is the OEM replacement impeller washer for the CSPH and CCSPH Series commercial pumps.

The impeller washer seats between the impeller and the pump shaft assembly, maintaining proper axial positioning and protecting mating surfaces from wear under the high-torque loads characteristic of large commercial pump operation. A damaged or missing washer can allow impeller movement that accelerates wear on adjacent components and degrades hydraulic performance. Replace this washer any time the impeller is removed for service.

Specifications

Fits Into

Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering.

Pro Tip

When servicing the impeller on a CSPH or CCSPH Series pump, inspect the washer for deformation, corrosion pitting, or surface scoring before reinstalling. Even minor surface damage on a high-HP commercial pump can accelerate wear on the impeller hub and shaft. This is a low-cost component — replace it as a matter of course any time the impeller is pulled, rather than waiting for visible failure. Confirm the part number stamped or etched on your original washer matches 38917-0203 before ordering.