25357-300-000 Seal Plate for Whisperflo and Intelliflo - Durable Seal

Our review of the 25357-300-000 seal plate looks at who needs this replacement and why it matters. Designed as a direct fit for Pentair Whisperflo and Intelliflo variable speed pool pumps, this seal plate aims to stop leaks and protect the motor. For pool owners with older Whisperflo or Intelliflo pumps who want a straightforward parts swap, the main reason to buy is the combination of PET construction and included gasket and shaft seal, which together address common sealing failures without a full pump rebuild.

Key Features

• Compatibility: Fits Pentair Whisperflo and Intelliflo variable speed pumps so it replaces part number 25357-300-000 and 074564 for a direct swap.
• Durable material: Made from strong PET material to improve toughness and extend the service life of the seal plate under regular pool use.
• Leak protection: Engineered for good sealing performance to reduce the chance of liquid or solid particles passing adjacent joint surfaces.
• Motor protection: Prevents external impurities such as dust from entering the pump motor, helping avoid water damage from seal failure.
• Complete kit: Ships with a replacement gasket and shaft seal PS-1000 included so basic resealing work can be done without sourcing extra parts.

Who It's For

This part suits pool owners, maintenance technicians, and repair shops who service Pentair Whisperflo and Intelliflo pumps and need a reliable seal plate replacement that matches Pentair part numbers 25357-300-000 and 074564. It is especially useful when a failing seal plate is the likely cause of motor moisture or visible leaks at the pump housing.

Those who should look elsewhere include owners of non-Pentair pump makes or anyone needing a full motor rebuild kit; this product is a targeted replacement plate and gasket set rather than a complete pump overhaul or electrical component replacement.

Pros & Cons

Pros

• Direct compatibility with Pentair Whisperflo and Intelliflo pumps simplifies installation and reduces fitment guesswork.
• PET construction offers improved toughness and is likely to extend the life of the seal compared with brittle alternatives.
• Includes the shaft seal PS-1000 and gasket, providing a more complete repair kit for common leaks.
• Good sealing performance helps keep dust and solids out of the motor area.

Cons

• Some customers report mixed experiences with leakage, so performance can depend on installation quality and pump condition.
• Not a replacement for parts outside the listed Pentair models or for pumps requiring additional worn components.

Specifications

Our Verdict

The 25357-300-000 seal plate is a practical, value-minded replacement for owners of Pentair Whisperflo and Intelliflo pumps who need to address leaks without replacing the entire pump. With PET construction and a included gasket and PS-1000 shaft seal, it delivers solid durability and convenience for routine repairs, though careful installation is important to avoid mixed sealing results reported by some users.

Frequently Asked Questions

Will this fit my Intelliflo variable speed pump?
Yes, this seal plate is specified to fit Intelliflo variable speed pumps and Pentair Whisperflo models that use part numbers 25357-300-000 or 074564.

Are all necessary seals included?
Yes, the package includes the seal plate, the gasket, and the shaft seal PS-1000 for the basic reseal job.

Does the PET material resist wear?
The PET construction is chosen for improved toughness and durability, which helps extend the life of the seal compared with less robust materials.