Pentair 355331 Diffuser O-Ring | SuperFlo & Challenger Pumps

The Pentair Diffuser O-Ring 355331 is a genuine OEM replacement for SuperFlo VS/VST and Challenger pumps made after 6/17/19. Designed to provide a tight seal within the pump diffuser, this O-ring prevents water leakage that can lead to reduced efficiency or damage. Made from durable, pool-grade materials, it resists chlorine and constant water exposure to deliver long-lasting performance. By replacing worn or damaged O-rings with OEM parts, you help extend pump life and maintain consistent system reliability. This component is essential for keeping pumps sealed, efficient, and operating at peak capacity.

Highlights

• Exact OEM Fit: Pentair 355331 O-ring designed to original factory specifications for SuperFlo VS/VST and Challenger pumps.

• Leak-Free Seal: Creates a watertight connection in the diffuser assembly, protecting the pump from efficiency loss.

• Durable Material Build: Manufactured from chlorine- and chemical-resistant rubber for extended use in pool environments.

• Critical to Maintenance: Regular O-ring replacement prevents leaks and maintains consistent system performance.

• Supports Optimal Efficiency: Helps sustain water pressure and circulation, keeping pumps running smoothly.

• Long-Term Reliability: Genuine OEM construction ensures long service life and dependable function.

• Easy Installation: Designed for quick, direct replacement to restore pump sealing capability.

Includes

• (1) Pentair 355331 Diffuser O-Ring

Compatibility

For pumps manufactured after 6/17/19

• Pentair SuperFlo VS / VST Pumps
• Pentair Challenger Pumps
• Pentair Diffuser - 355949

Note: This o-ring may be compatible with your pump, please refer to your systems owners manual to ensure compatibility.

Additional Info

Need the OEM Pentair Diffuser O-Ring 355331? This section covers installation, fitment, and troubleshooting for SuperFlo and Challenger pumps, with a focus on local pricing and availability.

Installing the Pentair 355331 O-Ring

The O-ring is designed to create a precise seal inside the diffuser. Correct installation ensures water-tight performance and efficient pump operation.

How do I replace the Pentair 355331 O-ring in my Challenger pump?

Can I check local price and shop stock before buying the 355331?

Is the 355331 O-ring compatible with Pentair diffuser part 355949?

Do I need silicone lubricant when installing this O-ring?

Fixing Common Seal and Leak Problems

Leaks around the pump diffuser are often caused by a damaged O-ring. The 355331 provides a reliable seal to restore performance and prevent water loss.

Why is my SuperFlo pump leaking water near the diffuser?

Can a bad O-ring reduce water pressure in my pump system?

How do I test if the 355331 O-ring is still sealing properly?

Do local shops provide replacement O-rings for Challenger pumps?

Local Stock and Pricing Options

Wholesale Pool Mart provides the 355331 at competitive local pricing, making it easy to replace seals quickly and restore pump performance.

Where can I buy the Pentair 355331 O-ring near me?

Does Wholesale Pool Mart carry the lowest local price for this O-ring?

How can I confirm availability before heading to the store?

Are multiple O-rings available locally for service professionals?

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