Pentair Shaft Seal, 5/8" Shaft, Buna (354545S) suctions and part number is important

and part number is important before installation

this Waterway black weir door assembly is a practical replacement when the original skimmer door needs renewal

and available working space before using it on an installed plumbing run

The included nut adds practical value because it helps the replacement feel more complete and reduces the need to reuse fastening hardware that may already be worn

Designed for compatible valve connection service

Pentair Shaft Seal, 5/8" Shaft, Buna (354545S) suctions and part number is importantService a leaking pump wet end with this 5 8" Buna shaft seal. The seal creates a critical barrier between the impeller area and the motor side of the pump, helping prevent water from reaching bearings, windings, and other motor components. This replacement is commonly used when water is dripping from the seal plate area, when the motor is being replaced, or when the pump is already disassembled for impeller work. Correct installation and clean seal