Pentair Impeller Washer | CSPH/CCSPH Series Commercial Pump | 38917-0203 Inlets & Skimmers Intelligent robotic pool cleaner

Intelligent robotic pool cleaner

Pentair Large Concrete Niche 1" Rear Conduit Hub

⚠️ Compatibility Note

Buttress threads engage differently from standard pipe threads — they are designed to resist the axial forces exerted by pressurized water against the tank wall

cross-reference the part number molded or stamped on your existing lid against R172385

Pentair Impeller Washer | CSPH/CCSPH Series Commercial Pump | 38917-0203 Inlets & Skimmers Intelligent robotic pool cleanerThe 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