Replacing WhisperFlo Pump Seal

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Water treatment guide

Removing Old Pump Seal

Knockout the old pump seal by gently tapping it from the center of the seal plate with a screw driver and a hammer as shown on the image below. Also remove the old pump seal ceramic part that is still inside the impeller. Clean both the seal plate and impeller center pump seal chamber for the new replacement seal.


Install the New Pump Seal

Now flip the seal plate so you can see the the pump seal chamber and the black seal plate gasket is facing up as shown in the picture below. Apply a little Silicone Sealant at the bottom of the seal plate groove where the metallic pump seal spring is going to be placed to get extra tight seal. Align the new metallic pump seal spring at the center of the seal plate and tap it in place with a round PVC pipe or any other suitable material to push the pump seal all the way in (do not directly hammer in the seal spring it can be damaged). Now insert the ceramic piece of the pump seal to the center of the impeller seal chamber.



Finally, assemble back the seal plate to the motor, secure it with the four seal plate bolts, insert impeller on to the motor shaft and secure it with the impeller screw. Reassemble the pump back following the the steps show so far in the reverse direction. Please note that you may also want to replace Seal Plate gasket, Diffuser gasket, and Imperller O-ring so your pump is completely rebuilt with new components.


WhisperFlo pool pump Parts

Do you need to rebuild your Pentair WhisperFlo pump?

Well, we have a convenient and affordable solution with every part needed to rebuild your pump packed in one kit:

The GO-KIT-32 includes:

Pump seal assembly (part #16)
Seal Plate O-ring
strainer cover O-ring (part #3)
Imperller O-ring (part # 15)
Diffuser gasket (*Part #9)

Replacing your Pentair WhishperFlo pump motor?
Our original Pentair replacement motors and rebuild kit will save you a lot of money! [Motors] and [rebuild kit]




Pentair WhisperFlo Strainer Basket part # 070387