Pentair Sta-Rite 11" Black Cartridge Filter O-Ring for Posi-Flo II | WC9-3 Pool Season Stain & Scale leading to significant energy savings

leading to significant energy savings

If your Sensor Plate uses bent tabs then you will need the Black Sensor Assembly

🛠️ Shut Off Power to the Pool System – Always turn off the pool pump and power to the system before working on the backwash valve

more efficient operation

Pentair Sta-Rite 11" Black Cartridge Filter O-Ring for Posi-Flo II | WC9-3 Pool Season Stain & Scale leading to significant energy savingsPentair Sta Rite 11" Black Cartridge Filter O Ring for Posi Flo II WC9 3 OEM Pentair Sta Rite 11" black cartridge filter O ring for Posi Flo II PTM series and PTM135 filters. Helps restore a proper tank seal. Features Genuine Pentair Sta Rite replacement cartridge filter O ring. Fits Posi Flo II PTM50, PTM70, PTM100, and PTM135 series filters. Black O ring design for tank sealing service. Also referenced for separation tank assembly use. Direct OEM