Pentair Stainless Steel Strainer Basket 5F | Challenger High Flow Pump | 355901 Primers A deteriorated or displaced diffuser

A deteriorated or displaced diffuser O-ring reduces hydraulic efficiency and can allow air infiltration into the pump housing

or collapsed sections — replacing only one damaged piece while leaving adjacent worn sections in place will result in a repeat service call

A basket that isn't fully seated can allow debris bypass even when the pump lid is secured

Also known as: PG1902

The lid assembly seals the top of the LeafVac debris canister

Pentair Stainless Steel Strainer Basket 5F | Challenger High Flow Pump | 355901 Primers A deteriorated or displaced diffuserThe Pentair Stainless Steel Strainer Basket (355901) is the OEM replacement strainer basket for the Challenger High Flow Pump in 5F configurations. The strainer basket sits inside the pump's strainer housing and intercepts debris leaves, hair, and other particulates before they reach the impeller. Keeping this basket in good condition maintains pump flow rate and protects the impeller from damage. Replace when the basket shows visible cracks,