CMP 25357-300-000 replacement seal plate for Pentair Whisper-Flo pumpsCMP Replacement Pentair Whisper-Flo Pump Seal Plate, 25357-300-000 In stock$9699
CMP 25357-300-000 replacement seal plate for Pentair Whisper-Flo pumps
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CMP Replacement Pentair Whisper-Flo Pump Seal Plate, 25357-300-000

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$9699
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Quick overview

  • For Whisper-Flo pumps Made as a replacement seal plate for the Pentair Whisper-Flo.
  • CMP built An aftermarket part from CMP rather than the original manufacturer plate.
  • Carries the shaft seal The seal plate holds the stationary half of the shaft seal and closes the wet end against the motor.
  • The plate the motor bolts to It is the mounting face between motor and volute, so it has to sit flat.
  • Fix for a cracked plate Cracks, warping and a damaged seal bore are what take a seal plate out of service.
  • CMP part 25357-300-000 Ordered by that part number so the same replacement can be sourced again.
Full description and specifications ↓

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Product details

The CMP 25357-300-000 is a replacement seal plate for Pentair Whisper-Flo pumps. It is an aftermarket part built by CMP rather than the original manufacturer plate.

What the seal plate does

It is the barrier between pump water and the motor. The motor bolts to one face, the volute seals against the other, and the plate holds the stationary half of the shaft seal square to the shaft. If it is not flat and its seal bore is not clean, the shaft seal cannot do its job.

When it needs replacing

Cracks, warping and a scored or chewed seal bore. The tell is a pump that keeps weeping at the motor after a new shaft seal has been fitted, which means the seal was never the problem. Fit a new shaft seal along with the plate, since a seal that has been removed once will not reseat properly.

Specifications
Brand CMP
Manufacturer part number 25357-300-000
UPC 849640026489
Type Pump seal plate
Fits Pentair Whisper-Flo pumps
Build Aftermarket replacement
Shipping weight 2.45 lb
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

Is this a genuine Pentair part?
No. It is a CMP built replacement seal plate for the Pentair Whisper-Flo, part number 25357-300-000.
What does a seal plate do?
It separates the wet end from the motor. The motor bolts to it, the volute seals against it, and it holds the stationary half of the shaft seal square to the shaft.
Does the shaft seal come with it?
The listing is for the seal plate. Order a shaft seal at the same time, because a seal that has been pulled off the shaft should not be reused.
When should I replace the seal plate?
When it is cracked, warped, or the seal bore is damaged. A pump that still leaks at the motor after a fresh shaft seal usually has a seal plate problem.
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