Product Overview

The WhisperFloXF® XFK-20 Power End (Model 400619Z) is a complete OEM replacement power end designed for Pentair WhisperFloXF 5 HP pump systems. This assembly includes the full power end housing, impeller, and essential hydraulic components

Engineered for high-flow, high-efficiency performance, the XFK-20 Power End restores your pump’s hydraulic output, improves circulation, and ensures quiet, dependable operation for large residential and commercial pool systems.

Ideal For

• Existing WhisperFloXF 5 HP pumps needing a Power end replacement

• Commercial and high-volume residential pools

• Pools with large water features, vanishing edges, or long plumbing runs

• Restoring performance without purchasing a full new pump

Key Features

• Complete Pump PowerEnd Assembly: Includes housing, impeller, diffuser, and seals—factory-assembled and ready to install.

• 5 HP WhisperFloXF Design: Matches the hydraulic specifications and performance of the original pump.

• High-Flow Efficiency: XF engineering maximizes water volume while minimizing turbulence and energy loss.

• Heavy-Duty Construction: Durable composite materials resist corrosion, chemicals, and outdoor conditions.

• Quiet Operation: Designed for low vibration and reduced noise, even in high-output systems.

• OEM Fit: Direct replacement for WhisperFloXF 5 HP pump models—no modifications required.

Benefits

• Restores Like-New Pump Performance: Ideal when the motor is still functional but the wet end is worn or damaged.

• Lower Cost Than Full Pump Replacement: Saves money while delivering full hydraulic revitalization.

• Fast, Simple Installation: Comes pre-assembled for easier service by technicians.

• Improved Circulation & Flow: Essential for high-demand filtration systems and water features.

• Pentair OEM Quality: Ensures compatibility, reliability, and long service life.

Customer Q&A

Q: What exactly is included in the Power End?
A: The assembly includes the  Motor, impeller, diffuser, seal plate, and internal Power-end components

Q: Will this fit any WhisperFlo pump?
A: No. This model fits WhisperFloXF 5 HP configurations only.

Q: Is installation difficult?
A: Installation is straightforward but should be performed by a qualified technician for proper alignment and sealing.

Q: Can this be used in saltwater pools?
A: Yes. The Power-end materials are compatible with both saltwater and standard chlorine systems.

Specifications

• Model Number: 400619Z

• Series: WhisperFloXF®

• Horsepower Compatibility: 5 HP Motors

• Assembly Type: Complete Power End (Power End Only)

• Housing Material: Corrosion-resistant composite

• Application: Commercial & large residential pools, high-flow systems

• Includes: Motor, impeller, diffuser, seal plate, and required Power-end components

• Manufacturer: Pentair