Built by Pentair, this Buna-N O-Ring U9-389 60 Duro 9" Replacement is a trusted pick for pool owners and service pros alike.

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 top-tier 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 trustworthy 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.

Backed by Pentair's reputation for quality, this Buna-N O-Ring U9-389 60 Duro 9" Replacement ships fast and installs easily.