Swimables SW-21-150 WhisperFlo IntelliFlo Style Pump Wet End 3 HP
Swimables

Swimables SW-21-150 WhisperFlo IntelliFlo Style Pump Wet End 3 HP

SKU: SW-21-150
$259.95
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Restore Full Pump Performance Without Replacing the Motor

When a pool pump begins leaking, losing prime, or showing signs of internal wear, the motor is often still perfectly functional. In these cases, replacing only the wet end is the most cost-effective and professional repair. The Swimables SW-21-150 WhisperFlo® / IntelliFlo® Style Pump Wet End 3 HP with Hi-Temp Unions is designed to restore full hydraulic performance to compatible Pentair-style pumps without the expense of a complete pump replacement.

This wet end assembly includes the critical water-handling components of the pump and is engineered to mate directly to a 3 HP WhisperFlo or IntelliFlo-style motor. By replacing worn housings, diffusers, and impellers while retaining the existing motor, pool owners and service professionals can resolve leaks, restore flow, and extend equipment life at a fraction of the cost of a new pump.

This is a pool-specific pump wet end assembly, not a complete pump or motor.

What a Pump Wet End Does

The wet end is the portion of the pump responsible for moving water. It houses the impeller, diffuser, seal plate, and volute—components that experience constant exposure to water, pressure, heat, and pool chemistry.

A properly functioning wet end:

  • Generates flow and circulation

  • Maintains prime

  • Directs water efficiently through the system

  • Supports proper filtration and heating

  • Protects the motor from water intrusion

When the wet end becomes cracked, warped, or internally worn, performance drops and leaks often develop—even if the motor itself still runs smoothly.

For related components, wet end repairs are commonly paired with items from the Pool Pump Parts Collection.

WhisperFlo® / IntelliFlo® Style Compatibility

The Swimables SW-21-150 is engineered as a WhisperFlo / IntelliFlo-style wet end designed for use with compatible 3 HP motors.

Compatibility highlights include:

  • Designed for 3 HP pump applications

  • WhisperFlo® and IntelliFlo® style motor mounting

  • Correct seal plate alignment

  • Proper diffuser and volute geometry

  • Accepts standard pump internals

This unit is intended for style compatibility, meaning it matches the physical design and performance characteristics of Pentair WhisperFlo and IntelliFlo wet ends used in many residential and commercial pool systems.

Includes High-Temperature Unions for Easier Installation

A major advantage of the SW-21-150 is the inclusion of high-temperature unions, which simplify installation and future service.

Benefits of hi-temp unions include:

  • Easier plumbing connection and removal

  • Resistance to heat and pressure

  • Reduced risk of cracking during installation

  • Faster service and replacement cycles

Unions are especially valuable when replacing a wet end on an existing system, as they reduce the need for cutting and re-plumbing PVC lines.

Common Signs a Wet End Needs Replacement

Replacing the wet end is often the correct solution when the following symptoms appear:

  • Water leaking between motor and pump housing

  • Cracked or warped pump housing

  • Loss of prime or inconsistent flow

  • Reduced circulation despite a running motor

  • Excessive internal wear or corrosion

  • Repeated seal failures

In many cases, these problems originate from the wet end—not the motor. Installing a new wet end restores proper hydraulic performance while preserving the existing motor investment.

If system performance issues persist, circulation components in the Pool Pumps Collection should be reviewed.

Built for Pool Pump Operating Conditions

The Swimables SW-21-150 wet end is manufactured specifically for swimming pool pump environments.

Design considerations include:

  • Resistance to chlorinated and saltwater exposure

  • Structural integrity under continuous pressure

  • Precision molding for proper impeller clearance

  • Durable materials designed for long service life

This ensures reliable performance in demanding residential and commercial pool systems.

Why Replacing the Wet End Makes Sense

Complete pump replacement is not always necessary. When the motor is still operational, replacing the wet end offers several advantages:

  • Lower repair cost

  • Faster installation

  • Retains existing electrical connections

  • Restores original flow performance

  • Extends total pump lifespan

This approach is commonly used by professional service technicians as a smart, economical repair strategy.

For best results, wet end replacement should be paired with inspection of seals and O-rings from the Pool Equipment Collection.

Installation Considerations

Replacing a pump wet end requires basic mechanical knowledge and proper safety precautions.

General Installation Overview:

  1. Shut off power to the pump

  2. Disconnect plumbing unions

  3. Separate the old wet end from the motor

  4. Transfer motor to the new SW-21-150 wet end

  5. Reinstall seals and tighten mounting bolts

  6. Reconnect plumbing and restore power

Professional installation is recommended to ensure correct alignment, sealing, and electrical safety.

Ideal Applications

The Swimables SW-21-150 wet end is ideal for:

  • Residential in-ground pools

  • Commercial pools using WhisperFlo/IntelliFlo-style pumps

  • Pump rebuilds where the motor is still functional

  • Leak repair without full pump replacement

  • Preventative refurbishment of aging pumps

This wet end is frequently installed during system upgrades or major service intervals.

Protects and Supports Downstream Equipment

Restoring proper pump flow helps protect filters, heaters, salt systems, and plumbing from improper pressure or reduced circulation.

Wet end replacement supports:

  • Stable filter pressure

  • Efficient heater operation

  • Proper salt system flow

  • Balanced circulation throughout the pool

For full system health, wet end service should be coordinated with filtration components from the Pool Filters Collection.

Why Choose Swimables Replacement Wet Ends

Swimables replacement wet ends are engineered to match OEM performance characteristics while offering a cost-effective alternative to full pump replacement.

Benefits include:

  • Accurate OEM-style design

  • Pool-industry-specific materials

  • Reliable hydraulic performance

  • Compatibility with standard service procedures

The SW-21-150 is a trusted solution for restoring WhisperFlo and IntelliFlo-style pump systems.

Buy with Confidence from Benchmark Pool Supply

At Benchmark Pool Supply, we stock professional-grade pool pump components designed to restore performance—not generic substitutes. The Swimables SW-21-150 WhisperFlo® / IntelliFlo® Style Pump Wet End 3 HP with Hi-Temp Unions is selected for accurate fit, durability, and long-term reliability.

When you purchase from Benchmark Pool Supply, you receive:

  • Pool-specific pump replacement components

  • Clear compatibility guidance

  • Fast shipping or convenient local pickup

  • Support from knowledgeable pool professionals

We help you repair pumps correctly and avoid unnecessary full replacements.

 

Frequently Asked Questions

What does the Swimables SW-21-150 wet end replace?
The Swimables SW-21-150 replaces the wet end portion of WhisperFlo® and IntelliFlo® style 3 HP pool pumps.
Are high-temperature unions included?
Yes, this wet end includes hi-temp unions for easier installation and service.
Is this compatible with saltwater pools?
Yes, the materials are compatible with both chlorine and saltwater pool systems.
Should a professional install this wet end?
Professional installation is recommended to ensure proper sealing, alignment, and electrical safety.