Pentair Shaft Seal, 5/8" Shaft, Buna (U109-136SS) prostar or filtration problems caused by

or filtration problems caused by broken internal parts

making it useful for high-flow intake repairs where sealing and service access matter

and a clearly defined threaded bottom for compatible systems

For many users

Pentair Shaft Seal, 5/8" Shaft, Buna (U109-136SS) prostar or filtration problems caused byThis 5 8" Buna shaft seal is designed for compatible Sta Rite pump repairs where the seal between the wet end and motor has started to fail. Replacing the seal can help stop leaks, protect motor bearings, and restore confidence after a pump has been opened for service. It is a practical part to keep on hand for maintenance teams working on common pool pump rebuilds. For best results, inspect the impeller, seal plate, and shaft surface at the same