Pentair Challenger High Head Diffuser

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Replacement diffuser (Pentair 355148) for 1/2 HP full-rated or 3/4 HP up-rated Challenger High Pressure/High Head pumps, including models CHI-NI-1/2F and CHII-NI-3/4A. It channels water from the impeller into the volute to maintain head pressure and hydraulic efficiency. This OEM Pentair/PacFab part mounts behind the impeller; use it on High Head Challenger versions, not the standard-flow model. Show more