Pentair Diffuser | Challenger High Pressure Pump | 355545Z Variants (11) Stainless Steel Self-Drilling Screws

(11) Stainless Steel Self-Drilling Screws & (1) Driver Bit

When the nozzle is worn

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Check your existing unit or equipment manual to confirm whether your system falls within this revision before placing an order

Type Brand Part Number Notes OEM Compatible American — — OEM Compatible Astral — — OEM Compatible Hayward — — OEM Compatible Pac-Fab — — OEM Compatible Pentair — — OEM Compatible Waterway — — (This is not an exhaustive list

Pentair Diffuser | Challenger High Pressure Pump | 355545Z Variants (11) Stainless Steel Self-Drilling ScrewsThe Pentair 355545Z is the OEM replacement diffuser for the Challenger High Pressure inground pump. What It Does The diffuser channels water exiting the impeller into a controlled, decelerating flow path, converting velocity into pressure before water exits the pump volute. A cracked, worn, or mismatched diffuser disrupts this conversion, reducing pump output pressure and flow efficiency. Replacing it with the correct OEM part restores designed