Product Overview

The Pentair 355604 Challenger Pump Impeller is a genuine OEM replacement impeller engineered for compatible Pentair Challenger® High Pressure pool pumps equipped with 2 HP Full Rated or 2.5 HP Up Rated motors. As the primary hydraulic component inside the pump, the impeller is responsible for drawing water into the pump and delivering the flow and pressure needed for proper filtration, heating, water features, and automatic cleaning systems.

Manufactured to Pentair's original specifications, the 355604 restores factory pump performance when replacing a worn, cracked, clogged, or damaged impeller. A failing impeller can result in reduced water circulation, low filter pressure, difficulty priming, excessive pump noise, poor cleaner performance, and increased strain on the pump motor.

This listing includes the impeller only. The diffuser, shaft seal, diffuser O-ring, impeller screw, seal plate, and motor are sold separately. For best results, Pentair recommends replacing the mechanical shaft seal whenever the impeller is removed during pump service.

Key Features

• Genuine Pentair OEM replacement impeller
• Designed for Challenger® High Pressure pool pumps
• Fits 2 HP Full Rated motors
• Fits 2.5 HP Up Rated motors
• Precision-balanced for smooth, efficient operation
• Heavy-duty thermoplastic construction
• Restores original water flow and pressure
• Corrosion and chemical resistant
• Direct OEM replacement
• Ideal for residential and commercial pool systems

Benefits

Replacing a worn impeller restores your pump's hydraulic efficiency and helps maintain proper water circulation throughout the pool system. Improved circulation supports better filtration, heater performance, cleaner operation, and overall water quality.

Using a genuine Pentair impeller ensures the proper vane design, balance, and fit required for Challenger High Pressure pumps. OEM components help reduce vibration, improve energy efficiency, and extend the life of the pump.

During installation, replacing the shaft seal is highly recommended to help prevent future leaks and avoid additional labor if the old seal fails shortly after repair.

Specifications

Compatible Pumps

The Pentair 355604 impeller is designed for compatible Challenger High Pressure pump models using:

• 2 HP Full Rated motors (2F)
• 2.5 HP Up Rated motors (2-1/2A)

Important: Pumps manufactured before October 1, 1992 require both the updated 355604 impeller and 355545 diffuser when replacing the original impeller. Verify your pump's manufacturing date before ordering.

Installation Information

Disconnect electrical power before servicing the pump. Remove the motor assembly and inspect the diffuser, shaft seal, diffuser O-ring, and seal plate for wear or damage before installing the new impeller.

Thread the impeller securely onto the motor shaft according to Pentair service procedures. After reassembly, fully prime the pump and inspect for proper operation and leaks before returning the system to service.

Professional installation is recommended.

Confirm Before Ordering

Please verify:

• Your pump is a Pentair Challenger® High Pressure model.
• Your motor is 2 HP Full Rated or 2.5 HP Up Rated.
• Your existing impeller is part number 355604.
• You do not require the matching diffuser or shaft seal.
• Your pump has been properly diagnosed as having a damaged impeller.
• If your pump was built before 10/1/1992, order the updated 355545 diffuser along with this impeller.

Warranty Information

The Pentair 355604 impeller is covered by the manufacturer's limited warranty against defects in materials and workmanship. Warranty does not cover improper installation, freeze damage, chemical abuse, misuse, or damage caused by worn seals, motor failure, or incompatible pump configurations.

Customer Q&A

Will this fit every Pentair Challenger pump?
No. It is designed specifically for Challenger High Pressure pumps using 2 HP Full Rated or 2.5 HP Up Rated motors.

Does this include the shaft seal?
No. The shaft seal is sold separately and should be replaced during impeller service.

What diffuser should be used with this impeller?
Compatible pumps use diffuser 355545. Pumps manufactured before October 1, 1992 require updating to both the 355604 impeller and 355545 diffuser together.

Is this a genuine Pentair OEM part?
Yes. Part number 355604 is an original Pentair replacement impeller for compatible Challenger High Pressure pumps.