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Pentair 357100Z – Black Seal Plate Gasket
Product Overview
The Pentair 357100Z is a genuine black seal-plate gasket designed for use in select Pentair circulation pumps. It restores the sealing interface between the seal plate and pump housing, helping prevent leaks, bypass, and moisture intrusion into the motor compartment.
Key Features
- OEM-specified gasket for select Pentair models (WhisperFlo, IntelliFlo VS/VF/VSF series, and other compatible pumps produced from February 2008 onward).
- Manufactured from durable Buna-rubber material selected for chemical resistance and long service life in pool pump environments.
- Thin profile gasket enables tight sealing without altering clearance or bolt torque requirements.
- Low-cost service part that helps avoid more costly housing or motor damage by maintaining structural integrity of the pump seal area.
Technical Specifications
- Part Number: 357100Z
- Color: Black
- Material: Buna (nitrile) rubber gasket
- Fits: Select Pentair WhisperFlo pumps (models manufactured Feb 1 2008 to present) and many IntelliFlo series pumps
- Weight: Approx. 0.06 lb
Compatibility & Fitment
This gasket is designed to service Pentair circulation pumps where the seal plate is removed or leaking. Confirm your pump model and manufacture date before replacing. Proper fitment ensures the pump housing and motor compartment stay dry and maintains pump performance.
Installation Instructions
- Turn off power to the pump and isolate electrical supply before servicing.
- Drain or relieve pressure from the pump housing and remove the pump lid or volute to access the seal plate.
- Remove the old gasket and clean the mating surfaces of the pump housing and seal plate — ensure surfaces are dry and free of debris.
- Place the new 357100Z gasket in position, ensuring proper orientation to match the housing bolt pattern and recess.
- Reassemble the seal plate and motor coupling per manufacturer’s torque specs, then restore water flow and check for leaks.
Troubleshooting
- Leak between motor and pump housing: Confirm gasket is seated flat and not twisted; inspect for damaged or uneven bolt tightening.
- Moisture or corrosion in motor compartment: A damaged or missing gasket is a common cause—replace the gasket and clean out any intrusion before operating.
- Leak at housing seam after gasket replacement: Verify both mating flanges are clean, bolts are evenly torqued, and the motor shaft is aligned correctly.
Maintenance Tip
During annual pump service, inspect the condition of the seal plate gasket. If it shows signs of compression set, brittleness or chemical degradation, replace with a new 357100Z gasket to maintain reliable sealing and prevent future service issues.
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