Product Overview

The Pentair Black Seal Plate with 6 Inserts is a genuine OEM replacement component designed for compatible Pentair Challenger High Flow, Challenger High Pressure, and WaterFall specialty pool and spa pumps. The seal plate forms the critical interface between the pump motor and wet end while providing the mounting area for the mechanical shaft seal. Replacing a cracked, warped, damaged, or worn seal plate helps maintain proper alignment and sealing throughout the pump assembly.

Ideal For

• Pentair Challenger High Flow pumps

• Pentair Challenger High Pressure pumps

• Pentair WaterFall AFP-75 and AFP-120 pumps

• Professional pump repairs and rebuilds

• Replacing damaged or distorted original seal plates

Key Features

• Genuine Pentair OEM replacement component

• Black molded construction

• Includes six factory-installed inserts

• Supports the mechanical shaft seal area

• Provides the mounting interface between motor and pump wet end

• Designed for compatible Challenger and WaterFall pump assemblies

Benefits

The seal plate plays an important role in maintaining proper pump alignment and creating the interface required for the shaft seal. Damage around the seal seat, mounting points, or housing surface can contribute to leakage and premature wear of surrounding components.

Replacing the damaged plate with the correct Pentair OEM component helps return the pump to its intended factory configuration without requiring replacement of an otherwise serviceable complete pump.

During seal plate replacement, technicians can also inspect the shaft seal, impeller, diffuser, housing gasket, mounting components, and motor shaft for additional wear.

Compatibility

Pentair identifies this seal plate for compatible Challenger High Flow and Challenger High Pressure pumps. It is also used with Pentair WaterFall Specialty Pool and Spa Pump models AFP-75 and AFP-120.

Compatibility should always be confirmed using the pump model number and existing component before ordering. Pentair produced multiple Challenger pump configurations, and similar-looking seal plates may not be interchangeable.

The 5 HP Challenger configuration may use a different seal plate, so horsepower and exact pump model should be verified before purchase.

Installation & Replacement Context

Replacing the seal plate requires removal of the motor-side pump assembly and access to the mechanical shaft seal. Because pool pumps combine electrical equipment with a pressurized hydraulic system, installation by a qualified pool-equipment professional is recommended.

Inspect the mechanical shaft seal whenever the seal plate is replaced. Seals, gaskets, bolts, impellers, and other rebuild components are not automatically included.

What's Included

• One black Pentair seal plate

• Six inserts

Specifications

Customer Q&A

Does this include the six inserts?
Yes. This Pentair seal plate includes six inserts.

Does it include the mechanical shaft seal?
No. The mechanical shaft seal and other pump-rebuild components are sold separately.

Will this fit every Pentair Challenger pump?
No. Confirm the complete pump model before ordering because Challenger pumps were manufactured in several configurations.

Is this a genuine Pentair part?
Yes. This is an OEM Pentair replacement seal plate for the specified compatible pump applications.

Order the Correct OEM Part with Confidence

When your compatible Challenger or WaterFall pump requires a replacement seal plate, choose the genuine Pentair OEM component engineered for the original pump assembly. Verify your pump model before ordering, then purchase the Pentair 355004Z with confidence to complete the repair using the correct factory replacement part.