Pentair Collector Hub Assembly | Cristal-Flo T-BP Series | WC137-519P FC9450 The Polaris ball bearing swivel

The Polaris ball bearing swivel (D20) replacement part is built specifically for Polaris pressure-side pool cleaners - the global leader in pressure cleaning

This collar seats within the skimmer body and controls the positioning of the skimmer throat relative to the pool waterline

Full 4 foot overlap for above grounds

Integrated grab handles

Pentair Collector Hub Assembly | Cristal-Flo T-BP Series | WC137-519P FC9450 The Polaris ball bearing swivelThe Pentair Collector Hub Assembly (WC137 519P) is the OEM replacement hub assembly for the Sta Rite Cristal Flo T BP series high rate sand filter, specifically the T 240BP 1 model. The collector hub is an internal filter component that directs water flow through the lateral assembly at the base of the filter tank. When this part fails or cracks, water bypasses the filter media and returns to the pool unfiltered making it a critical service