roduct Overview

The Pentair 355604Z Impeller is a genuine Pentair replacement impeller designed for compatible Pentair Challenger high-pressure pool pumps. This impeller is made for 2 HP full-rated and 2.5 HP up-rated Challenger pump applications, helping restore proper water flow, system pressure, and hydraulic performance.

The impeller is one of the most important internal pump components. It spins inside the pump housing to move water through the circulation system. When an impeller is worn, cracked, clogged, warped, or damaged, the pump may lose prime, experience reduced flow, run louder than normal, or fail to provide adequate pressure for filtration, heating, cleaners, or water features.

This replacement impeller is commonly referenced for Challenger high-pressure pump models and is listed with UPC 788379658915. Multiple pool parts listings identify 355604Z as a Pentair Challenger impeller for 2 HP full-rated / 2.5 HP up-rated high-pressure pumps.

Ideal For

• Pentair Challenger high-pressure pump repairs
• 2 HP full-rated Challenger pumps
• 2.5 HP up-rated Challenger pumps
• Restoring reduced pump flow
• Repairing damaged or clogged impellers
• Pump rebuilds and wet-end service
• Pool systems needing strong pressure performance
• Filtration, heater, cleaner, and water feature circulation
• Professional pool pump service repairs
• Replacing worn OEM impellers

Key Features

• Genuine Pentair replacement impeller — designed for compatible Challenger pump applications.
• Fits 2 HP full-rated models — made for Challenger pumps using the 2 HP full-rated impeller configuration.
• Fits 2.5 HP up-rated models — also used with compatible 2.5 HP up-rated Challenger pumps.
• High-pressure pump design — engineered for Challenger high-pressure pump performance.
• Restores water movement — helps recover proper flow and pressure when the old impeller is worn or damaged.
• Closed-face impeller design — supports strong pressure generation in compatible pump systems.
• OEM fit and function — built to match supported Pentair Challenger pump part diagrams.
• Durable pool-grade construction — designed for normal pool water circulation environments.
• Cost-effective pump repair — replaces the impeller without replacing the complete pump.
• Professional service part — ideal for pump rebuilds, seal replacements, and wet-end repairs.

Benefits

The Pentair 355604Z impeller helps bring compatible Challenger pumps back to proper performance. If the existing impeller is damaged, blocked, or worn down, the pump may struggle to move water efficiently, causing poor filtration, low return pressure, heater flow errors, cleaner performance issues, or reduced circulation.

Replacing the impeller with the correct OEM part helps restore the pump’s original hydraulic performance. This is especially important on high-pressure Challenger pumps, where impeller sizing must match the motor horsepower and pump wet-end configuration.

For pool professionals, the 355604Z is a key repair part when rebuilding compatible Challenger pumps, especially when paired with a new shaft seal, diffuser inspection, and gasket replacement.

Specifications

Included Components

• 1 × Pentair 355604Z Challenger replacement impeller

Shaft seal, diffuser, diffuser gasket, seal plate gasket, impeller screw, motor, pump housing, o-rings, unions, and installation labor are sold separately unless specifically included by the supplier.

Compatibility Notes

This impeller is designed for compatible Pentair Challenger high-pressure pump models rated for 2 HP full-rated or 2.5 HP up-rated operation.

Common compatibility references include:

• Pentair Challenger high-pressure pumps
• 2 HP full-rated Challenger pump configurations
• 2.5 HP up-rated Challenger pump configurations
• Replacement applications using part 355604Z or 355604
• Related cross-references 5002-05F, 35-110-1620, and 40394

Always confirm the exact pump model, motor horsepower, service factor, impeller part number, diffuser compatibility, and pump parts diagram before ordering. Impellers must be matched correctly to the motor and wet end.

Installation Notes

This impeller should be installed by a qualified pool professional or pump technician. Turn off all power at the breaker before servicing the pump.

During impeller replacement, inspect the shaft seal, diffuser, diffuser gasket, seal plate gasket, motor shaft, and pump housing. It is strongly recommended to replace the shaft seal any time the impeller or motor is removed.

After installation, prime the pump, check for leaks, verify proper flow and pressure, and confirm that the motor is not overloading.

Customer-Facing Q&A

Q: What is the Pentair 355604Z?
A: It is a genuine Pentair replacement impeller for compatible Challenger high-pressure pumps rated 2 HP full-rated or 2.5 HP up-rated.

Q: What is the SKU?
A: The SKU is 355604Z.

Q: What is the UPC / GTIN?
A: The UPC / GTIN is 788379658915.

Q: What is the related part number?
A: The related part number is 355604.

Q: What pump does this fit?
A: It fits compatible Pentair Challenger high-pressure pumps with matching 2 HP full-rated or 2.5 HP up-rated configurations.

Q: Is this for a 2 HP or 2.5 HP pump?
A: This impeller is commonly used for 2 HP full-rated and 2.5 HP up-rated Challenger pumps.

Q: Is this a complete pump?
A: No. This listing is for the impeller only.

Q: Does this include the shaft seal?
A: No. The shaft seal is sold separately unless specifically included by the supplier.

Q: Should I replace the shaft seal when replacing the impeller?
A: Yes. It is strongly recommended to replace the shaft seal whenever the pump is opened for impeller or motor service.

Q: What symptoms can a bad impeller cause?
A: A damaged or clogged impeller can cause low flow, poor pressure, noisy operation, overheating, poor cleaner performance, or circulation problems.

Q: Should this be professionally installed?
A: Yes. Professional installation is recommended to ensure correct fitment, shaft seal replacement, proper reassembly, and safe pump operation.