Pentair U9-359 Drain Plug O-Ring

The Pentair U9-359 Drain Plug O-Ring is a high-quality replacement part designed to ensure a reliable, watertight seal for Pentair pool and spa equipment drain plugs. This OEM O-ring is essential for preventing leaks and maintaining optimal performance in your filtration and pump systems.

• ✅ Compatible Equipment: Fits select Pentair pumps, filters, and other equipment requiring the U9-359 drain plug O-ring.
• 🔒 Leak Prevention: Maintains a tight seal to prevent water loss from your pool or spa system.
• 🛠️ Durable Construction: Manufactured from high-grade elastomer for chemical and temperature resistance.
• 🔄 Easy Installation: Replace your old or worn O-ring in minutes—no special tools required.
• 📦 OEM Quality: Genuine Pentair part ensures a perfect fit and lasting performance.

📋 Installation Directions:

1. Turn off your pool or spa equipment and release pressure before servicing.
2. Remove the drain plug from your pump or filter.
3. Remove the old O-ring and clean the O-ring groove.
4. Lightly lubricate the new O-ring with a silicone-based lubricant (do not use petroleum-based products).
5. Install the new O-ring onto the drain plug and reinstall the plug securely.
6. Restore system pressure and check for leaks.

📏 Dimensions: Standard size for Pentair U9-359 applications (see equipment manual for compatibility).

💡 Tip: Regularly inspect and replace O-rings as part of routine pool and spa maintenance to ensure optimal performance and avoid costly leaks.

🧩 Replaces: For use with Pentair equipment calling for U9-359 O-rings; check your owner's manual for part compatibility.