Pentair Screw (w/ C1-271P1Z Diffuser) for Max-E-Pro / Dyna-Pro Series Pump | U30-542SSZ

The Pentair U30-542SSZ is the OEM replacement stainless steel round-head diffuser cap screw for the Max-E-Pro and Dyna-Pro / Dyna-Pro E series inground pumps, used specifically with the C1-271P1Z diffuser.

This screw secures the diffuser within the pump volute, maintaining the precise alignment required for efficient water flow from the impeller into the discharge port. A loose or corroded diffuser screw allows the diffuser to shift under pressure, disrupting hydraulic performance and potentially causing vibration or premature wear on surrounding components. The stainless steel construction resists corrosion in the wet end environment where standard carbon steel fasteners are prone to seizing or rust failure.

Specifications

Fits Into

Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering.

Pro Tip

This screw is sold individually — order the quantity you need based on how many diffuser screws your pump requires. When replacing the diffuser screw, inspect the C1-271P1Z diffuser itself for cracks or wear; replacing a worn diffuser while the pump is already open avoids a repeat service call.