Pentair 357100Z Seal Plate Gasket (Black) – WhisperFlo / IntelliFlo Pumps

Pentair 357100Z Black Seal Plate Gasket — WhisperFlo & IntelliFlo Pumps

OEM black seal plate gasket 357100Z for Pentair WhisperFlo & IntelliFlo pumps (post-Feb 2008). Prevent leaks, restore pump seal integrity.

Features

• Genuine Pentair seal plate gasket matching OEM specifications. 
• Fits WhisperFlo pumps made from February 1, 2008, to present, and many IntelliFlo / VS / VSF / VF / i1/i2 series models. 
• Made of black Buna rubber for chemical and temperature durability. 
• Lightweight (~0.06 lb) part with special ID/OD design for proper fit. 
• Small-cost fix that prevents leaks, restores pump performance, and avoids bigger repairs.

Description

The Pentair 357100Z is a replacement seal plate gasket for the WhisperFlo and various IntelliFlo-series pumps (manufactured after Feb. 2008). As pumps age, the gasket between the seal plate and housing can deteriorate, leading to leaks or bypass that degrade performance. This gasket restores the original factory seal, preventing water intrusion, maintaining pressure, and protecting internal components from moisture damage. Its Buna material is resistant to harsh pool chemicals and thermal changes, ensuring long-lasting service.

Pro Tip

Before installing, ensure the mating surfaces are clean, dry, and free of old gasket or debris. Use a pool-safe silicone or rubber lubricant to help with installation and seating. While servicing, inspect adjacent seals such as the mechanical seal and diffuser O-ring; replacing worn parts together can save future service time.

Installation Tips

Always switch off the power and ensure the pump is fully de-energized before opening. Clean mating surfaces thoroughly. Lubricate the gasket lightly. Reassemble carefully without distorting the gasket. Avoid overtightening bolts, which can deform the gasket and lead to leaks.