Pentair Impeller | Challenger High Pressure Pump | 355604Z

OEM Replacement Impeller for the Pentair Challenger High Pressure Pump

The Pentair 355604Z is the OEM replacement impeller for the Challenger High Pressure Pump, sized for 2 HP Full Rated and 2-1/2 HP Uprated configurations. If your Challenger pump is losing prime, running noisily, or delivering reduced flow, a worn or damaged impeller is a primary suspect — this is the correct factory-spec replacement.

What It Does

The impeller is the rotating component at the heart of the pump's wet end. It draws water through the strainer housing and accelerates it outward through centrifugal force, generating the flow and pressure your pool system depends on. A cracked, worn, or clogged impeller directly reduces hydraulic output and can cause the pump to cavitate or lose prime entirely. Replacing with the correct OEM impeller restores the pump to its rated performance. Confirm the part number stamped or molded on your existing impeller matches 355604Z before ordering — impeller sizing is specific to HP rating and pump configuration.

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

Before installing the new impeller, inspect the diffuser and shaft seal for wear — these components are exposed to the same service conditions and often fail around the same time. Replacing them together during the same service visit avoids reopening the wet end shortly after. Also check the impeller bore and pump shaft for scoring or corrosion that could affect seating. Match the part number on your existing impeller to 355604Z to confirm you have the correct HP rating for your specific Challenger configuration before installation.