Pentair Buna-N O-Ring U9-389 – 60 Duro 9" Replacement Seal for Pool Equipment

The Pentair Buna‑N O‑Ring U9‑389 (60 Duro, 9") is a genuine OEM replacement seal designed to maintain secure, leak‑resistant connections in a variety of pool equipment applications. Made from high‑quality Buna‑N (nitrile) rubber at a 60 durometer hardness, this O‑ring offers excellent resistance to pool chemicals, oils, and environmental stress while retaining flexibility for reliable sealing.

Whether used in pump housings, filter assemblies, valves, or other pool system components, the U9‑389 O‑ring ensures proper sealing performance, supports stable hydraulic function, and helps prevent water loss and pressure issues. It’s an essential part for routine maintenance, rebuilds, or sealing repairs in residential and commercial pool systems.

Pentair Buna‑N O‑Ring U9‑389 (60 Duro, 9") Compatibility

• Designed for pool equipment specifying Pentair part U9‑389

• Compatible with pumps, filters, valves, and plumbing components requiring a 9" Buna‑N O‑ring

• Suitable for residential and commercial pool and spa systems

• Works in applications exposed to pool chemistry, sanitizers, and regular wet‑end use

• OEM part for Pentair and many compatible pool equipment setups