Pentair Diffuser O-Ring (Blue Coating) — Dyna-Pro Pump Seal || 357098Z

Pentair 357098Z Diffuser O-Ring (Blue Coating)

Blue-coated diffuser O-ring 357098Z for Pentair Dyna-Pro, Max-E-Pro & DynaWave pumps. Reliable seal to stop leaks and maintain pump performance.

Features

• OEM blue-coated O-ring made for Pentair’s Dyna-Pro, Max-E-Pro, and DynaWave pump models. :contentReference[oaicite:5]{index=5}
• Chemical-resistant material protects from chlorine/pool water corrosion. :contentReference[oaicite:6]{index=6}
• Precisely sized to provide a tight seal for diffuser assemblies. :contentReference[oaicite:7]{index=7}
• Helps restore pressure, stop leaks, and reduce noise from escaping water.
• Small, economical part that prevents costly pump failures.

Description

The Pentair 357098Z diffuser O-ring is a small but crucial seal between the diffuser and the pump body in Pentair’s Dyna-Pro, Max-E-Pro, and DynaWave series pumps. With a blue coating and durable elastomer construction, it resists chemical exposure and heat. When this O-ring fails, leaks, or causes a loss of pressure, it can reduce pump efficiency or damage other parts. Replacing the seal is quick and straightforward, and restores proper flow and pump performance.

Pro Tip

Apply a thin, pool-safe lubricant to the O-ring before installation to help it seat correctly. Also check mating surfaces (diffuser & seal plate) for nicks or damage—any irregularities can cause leaks even with a new seal. Always have spares on hand, since O-ring degradation is common in pool service.

Related Parts

• Pentair Seal Plate Cord Ring | U9-373Z
• Pentair Diffuser Assembly, 1 HP | C1-270PC

Installation Tips

Always shut off and lock out power before removing the pump diffuser. Ensure the old O-ring surface and housing groove are clean & dry. Lubricate the O-ring with a pool-safe silicone grease; do not over-stretch. Reassemble carefully to avoid twisting or pinching the seal.

We want you to have quick and easy access to warranty information for all the brands we carry. Please click on the links below to view each manufacturer’s warranty page:

• Pentair Warranty
  
• A&A (Pentair In-Floor) Warranty
  
• Fluidra Warranty (Zodiac / Jandy / Polaris / Caretaker)
  
• Paramount Warranty
  
• BlueSquare Warranty
  
• Hayward Warranty
  
• All Other Manufacturer Warranties
  

Note: Warranty coverage, registration, and service terms are provided directly by the manufacturer. Please review the details carefully to ensure proper understanding of coverage and claim procedures.