Pentair Mounting Plate 5F | Challenger High Flow Pump | 355495Z PVC Fittings Also replace the shaft seal

Also replace the shaft seal whenever the motor is removed for service — reinstalling an old seal against a freshly seated motor is a common cause of premature re-failure

this diffuser is the direct service replacement for the hydraulic end of the pump

Shoes worn thin or cracked at the edges are a common cause of a Navigator Pro or PoolVac XL that stalls

Any unused fountains can be returned for a full refund

Replacing all sealing components during a single service visit prevents a return trip when an adjacent seal fails shortly after

Pentair Mounting Plate 5F | Challenger High Flow Pump | 355495Z PVC Fittings Also replace the shaft sealThe Pentair Mounting Plate 5F (355495Z) is the OEM replacement mounting plate for the Pentair Challenger High Flow inground pump, specifically the 5F configuration. The mounting plate secures the motor to the pump housing, maintaining precise alignment between the motor shaft and the pump's internal components. A damaged or degraded mounting plate can compromise this alignment, leading to vibration, accelerated wear on the shaft seal, and potential