Pentair IntelliFlo 3.0 Energy Star Diffuser Assembly

The Pentair 356238Z is the diffuser assembly for the IntelliFlo 3.0 Energy Star variable speed pump. The diffuser sits around the impeller inside the wet end and guides water from the impeller into the pump housing, so a worn or cracked one costs you flow even when the motor and impeller are fine.

This is the genuine Pentair part, supplied as a complete assembly ready to fit. It is specific to the IntelliFlo 3.0, so check the model label on your pump before ordering.

If you are rebuilding the wet end, the matching IntelliFlo 3.0 impeller assembly is sold separately and is usually replaced at the same time.