Product Overview

The Pentair 355604Z Challenger Pump Impeller is a genuine OEM replacement impeller designed for compatible Pentair Challenger® High Pressure pool pumps rated at 2 HP Full Rated or 2.5 HP Up Rated. The impeller is the primary hydraulic component that draws water into the pump and delivers the flow and pressure required for proper filtration, heating, cleaning systems, and water features.

Manufactured to Pentair's original specifications, the 355604Z restores pump efficiency and hydraulic performance when replacing a worn, cracked, clogged, or damaged impeller. A failing impeller can cause reduced water flow, poor filter pressure, difficulty priming, noisy operation, diminished cleaner performance, or overheating due to reduced circulation.

This listing is for the impeller only. The shaft seal, diffuser, gaskets, motor, seal plate, impeller screw, and pump housing are sold separately. Pentair recommends inspecting and replacing the mechanical shaft seal whenever the pump is disassembled for impeller replacement.

Key Features

• Genuine Pentair OEM replacement impeller
• Designed for Challenger® High Pressure pumps
• Fits 2 HP Full Rated models
• Fits 2.5 HP Up Rated models
• Restores proper water flow and system pressure
• Precision-balanced for smooth operation
• Heavy-duty molded composite construction
• Direct OEM replacement
• Corrosion-resistant design
• Ideal for residential and commercial pool applications

Benefits

Replacing a damaged impeller can restore the pump's original hydraulic performance without replacing the complete pump or motor. Proper impeller performance improves circulation, filtration efficiency, heater operation, and cleaner performance while reducing unnecessary strain on the motor.

Using a genuine Pentair impeller ensures the correct vane geometry and hydraulic balance for Challenger pumps, helping maintain quiet operation and maximum efficiency.

During service, replacing the shaft seal at the same time is strongly recommended to prevent future leaks and reduce repeat labor.

Specifications

Installation Information

Disconnect electrical power before servicing the pump. Remove the motor assembly from the pump housing and inspect the impeller, diffuser, shaft seal, and seal plate for wear or damage.

Install the new impeller according to Pentair service procedures, ensuring the mechanical shaft seal is properly installed and the impeller is securely threaded onto the motor shaft. After reassembly, prime the pump completely and verify proper flow, pressure, and leak-free operation.

Professional installation is recommended for optimum performance and reliability.

Confirm Before Ordering

Please verify the following before purchasing:

• Your pump is a Pentair Challenger® High Pressure pump.
• Your existing impeller is part number 355604 or 355604Z.
• Your pump is rated for 2 HP Full Rated or 2.5 HP Up Rated.
• You do not require the diffuser or shaft seal.
• Your motor horsepower matches the original pump configuration.
• Your pump was correctly diagnosed as having a damaged impeller.

Warranty Information

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

Customer Q&A

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

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

What symptoms indicate a bad impeller?
Low water flow, poor filter pressure, noisy operation, difficulty priming, overheating, or reduced cleaner performance can all indicate a worn or damaged impeller.

Is this a genuine Pentair part?
Yes. Part number 355604Z is an original Pentair OEM replacement impeller.