Pentair Diffuser | Challenger High Pressure Pump | 355270Z C7447 Safety first — always release

Safety first — always release pressure before opening

maintaining a sealed chamber that allows the pump to prime and sustain suction during operation

While the pump is disassembled for seal service

addressing those components during the same service visit avoids reopening the enclosure unnecessarily

Pentair Diffuser | Challenger High Pressure Pump | 355270Z C7447 Safety first — always releaseThe Pentair Diffuser (355270Z) is the OEM replacement diffuser for the Challenger High Pressure inground pump, sized for the 11 2 HP Full Rated and 2 HP Up Rated configurations. The diffuser sits between the impeller and the volute, converting the high velocity water leaving the impeller into pressure. A cracked, worn, or incorrectly sized diffuser reduces hydraulic efficiency, disrupts flow through the pump, and can accelerate wear on the impeller.