PENTAIR Black Seal Plate Gasket
Product Overview
Pool techs reach for the Pentair 357100Z seal plate gasket when performing routine pump maintenance to ensure a watertight seal on WhisperFlo and IntelliFlo units.
This genuine Pentair black Buna gasket (part 357100Z) is the standard specification for WhisperFlo and IntelliFlo pumps manufactured from February 1, 2008, to the present. Unlike generic aftermarket alternatives that may vary in thickness or material density, this OEM part is engineered to withstand the high-pressure environment between the seal plate and the pump housing. In our experience, using the correct factory gasket is essential for preventing air leaks and maintaining optimal priming performance.
Benefits & What Makes It Different
OEM Buna Construction
The high-grade Buna-N rubber provides superior resistance to pool chemicals and heat, preventing the gasket from flattening or cracking prematurely.
Precision Fitment
Designed specifically for the WhisperFlo and IntelliFlo series, this gasket ensures a perfect seal without the need for excessive tightening of the housing bolts.
Restores Pump Prime
By sealing the gap between the seal plate and the volute, this part eliminates suction-side air leaks that cause priming issues and reduced water flow.
Compatibility
- Pentair WhisperFlo High Performance Pumps (2008-Present)
- Pentair IntelliFlo Variable Speed Pumps (2008-Present)
When To Use This
Pro Tip
When installing the 357100Z, always clean the groove in the seal plate thoroughly with a soft brush; even a small grain of sand or calcium buildup from hard water can prevent a perfect seal and lead to a slow drip.
Common Questions & Instructions
How do I know if my Pentair pump needs a new seal plate gasket?
If you notice water dripping from the bottom of the pump housing where the motor meets the wet end, or if you see air bubbles in the pump basket, the 357100Z gasket may be compressed or damaged.
Is the 357100Z gasket compatible with older WhisperFlo pumps?
This specific black gasket is designed for models manufactured from February 1, 2008, to the present; older models may require a different seal configuration, so check your manufacture date.
Should I use lubricant when installing this Pentair gasket?
Yes, we recommend applying a light coating of a silicone-based lubricant to help the gasket seat properly and prevent it from pinching during assembly; avoid petroleum-based products which degrade rubber.
Delivered today to your DFW neighborhood
Order this item by 2 PM Central on a weekday, and we'll have it on your driveway by evening. Same-day delivery is FREE to every ZIP in our DFW coverage area — no minimum — or it's free with our weekly service plan.
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