The Polaris PB4SQ Pump Body is a genuine replacement housing designed for use with Polaris PB4SQ booster pumps. The pump body forms the main structural shell of the booster pump, containing internal components such as the impeller, diffuser, seals, and O-rings while directing pressurized water through the system to power pressure-side pool cleaners.

Over time, pump bodies can become cracked, warped, or worn due to age, vibration, chemical exposure, or freeze damage. Even small imperfections in the housing can lead to water leaks, loss of pressure, increased noise, or premature wear on internal components. When the pump body is compromised, replacing seals alone is often not enough to restore reliable operation.

Replacing the pump body allows the booster pump to be rebuilt to proper operating condition without replacing the entire unit, restoring pressure output and protecting internal components from ongoing damage.

Why the Pump Body Matters

The pump body is the foundation of the booster pump.

Why this matters:

• Maintains a sealed, pressurized environment for internal components

• Prevents water leaks at the housing and connection points

• Ensures proper alignment of the impeller and diffuser

• Supports consistent pressure to pressure-side pool cleaners

• Reduces vibration, noise, and premature component wear

A damaged pump body can cause repeated seal failures, pressure loss, and unreliable cleaner performance if not corrected.

Designed for Polaris PB4SQ Booster Pumps

This pump body is manufactured to Polaris OEM specifications and is designed exclusively for Polaris PB4SQ booster pump models. The housing features correct port alignment, internal clearances, and mounting points to ensure proper fit and smooth hydraulic flow.

Using an OEM replacement housing ensures compatibility with original Polaris internal components and eliminates issues caused by misalignment or improper sealing. Aftermarket or incorrect housings can lead to poor performance or repeat leaks.

Always confirm pump model compatibility before installation.

Ideal for Booster Pump Rebuilds & Repairs

The PB4SQ pump body is commonly replaced during major booster pump repairs, freeze damage restoration, or when persistent leaks are traced back to the housing itself. It is often installed alongside new shaft seals, O-rings, and internal wear components to complete a full pump rebuild.

During installation, all sealing surfaces should be cleaned and inspected, and new gaskets or O-rings should be used to ensure proper sealing. Rebuilding the pump with a new housing helps extend equipment life and restore factory-level performance.

Product Specifications

Buy with Confidence from Benchmark Pool Supply

When you purchase the Polaris PB4SQ Pump Body from Benchmark Pool Supply, you’re getting a genuine OEM replacement part trusted by pool service professionals. We stock critical booster pump components to support reliable repairs and long-term cleaner performance.

Benchmark Pool Supply is your trusted source for professional-grade Polaris replacement parts and booster pump repair solutions.