Pentair (Pac‑Fab) Challenger Seal Plate Square O‑Ring – Model 355329Z
The Pentair 355329Z is an OEM square‑profile O‑ring designed for the front housing seal plate of Challenger high‑flow and high‑pressure in‑ground pumps, as well as WaterFall specialty pump models.
Key Specifications:
- Square O‑ring size: approximately 0.285″ × 0.200″ × 10.275″ (width × cross-section × perimeter)
- Material: UV- and chemical-resistant rubber compatible with pool environments
- OEM replacement part—ensuring correct fit and reliable sealing
Applications & Compatibility:
- Fits Pentair Challenger high‑flow and high‑pressure pump series
- Also compatible with certain Pentair WaterFall specialty pump models
- Replaces the seal between the front (seal plate) housing and pump body
Maintenance Tip: Replace this O-ring whenever you remove the seal plate or notice water leaks at the housing joint. Clean the sealing surface thoroughly, apply a light coat of pool-safe silicone grease, and ensure the O-ring seats evenly before reassembling the pump.
SKU: 355329Z
