Product Overview

The Pentair WhisperFlo High-Performance Pump 011642 is a commercial-grade, single-speed pool pump powered by a 1.5 HP three-phase motor. Designed for 208–230/460V, 60 Hz electrical systems, this pump is suited for compatible commercial pools, aquatic facilities, water features, and other professionally engineered circulation systems.

The WhisperFlo hydraulic design is engineered to provide strong circulation performance while maintaining quiet, efficient operation. Its robust pump housing, high-capacity strainer basket, and durable motor make it suitable for demanding pool-equipment installations requiring reliable daily circulation.

Because this model uses a three-phase motor, it is not intended as a direct replacement for typical residential single-phase pumps. The electrical supply, pump sizing, plumbing requirements, system flow, and motor rotation must be verified by a qualified professional before installation.

Ideal For

Commercial swimming pools

Aquatic facilities

Hotel and resort pools

Apartment and community pools

Large residential pool systems with three-phase service

Water features

Professionally engineered circulation systems

Equipment rooms with 208–230V or 460V three-phase power

Key Features

High-performance WhisperFlo hydraulic design

1.5 HP single-speed motor

Three-phase electrical configuration

Field-configurable 208–230/460V operation

60 Hz motor frequency

Quiet operating design

Durable thermoplastic pump housing

Large strainer basket for extended cleaning intervals

Clear lid for convenient basket inspection

Self-priming design

Designed for continuous pool-circulation applications

Suitable for compatible commercial installations

Benefits

Provides dependable pool-water circulation

Designed for demanding commercial applications

Three-phase motor supports compatible commercial electrical systems

High-capacity basket reduces maintenance frequency

Clear lid allows quick visual inspection

Self-priming design simplifies startup

Hydraulic design helps reduce unnecessary operating noise

Durable construction supports long-term equipment-pad use

Suitable for filtration, heating, sanitation, and circulation systems

Specifications

Warranty & Compatibility

Three-Phase Electrical Requirements

This pump requires a compatible three-phase electrical supply. It should not be connected to standard residential single-phase service.

Before installation, a qualified electrician must confirm:

• Available supply voltage
• Three-phase electrical service
• Correct motor-lead configuration
• Proper overload protection
• Circuit-breaker or disconnect sizing
• Grounding and bonding
• Motor rotation
• Local electrical-code requirements
• Compatibility with any external controller or motor starter

The motor must be wired for the actual supply voltage. Incorrect wiring or voltage can damage the motor and may void warranty coverage.

Important Motor-Rotation Notice

Three-phase motors can rotate in either direction depending on the incoming phase sequence. Pump rotation must be checked during startup.

Incorrect motor rotation can cause:

• Reduced water flow
• Poor pump performance
• Difficulty priming
• Excessive noise
• Motor or hydraulic damage

If rotation is incorrect, a qualified electrician can correct the phase sequence according to the motor and installation instructions.

Common Applications

The Pentair 011642 may be used in properly sized systems supporting:

• Pool filtration
• Pool heating
• Chemical sanitation
• Commercial circulation
• Water features
• Spa circulation
• Auxiliary water-treatment equipment

Actual performance depends on total dynamic head, plumbing configuration, pipe diameter, equipment resistance, elevation, and system design.

Installation Information

Professional installation is required. Before installation, verify:

• Pump-flow requirements
• Total dynamic head
• Plumbing size
• Suction-line configuration
• Available three-phase voltage
• Motor-starter requirements
• Circuit and overload protection
• Equipment-pad ventilation
• Pump clearances
• Grounding and bonding
• Local electrical and building codes

The pump should be installed on a stable, level equipment pad in a location protected from flooding and excessive moisture.

Confirm Before Ordering

• Confirm the required pump horsepower is 1.5 HP.
• Verify that the property has three-phase electrical service.
• Confirm the available voltage is compatible with 208–230/460V.
• Verify the system operates at 60 Hz.
• Confirm that a single-speed pump is required.
• Compare the complete existing pump model number.
• Verify plumbing connections and installation dimensions.
• Confirm the required system flow and total dynamic head.
• Do not order based on horsepower alone.
• Have a qualified professional confirm pump and electrical compatibility.

Not a Direct Replacement For

Do not assume this pump directly replaces:

• Single-phase WhisperFlo pumps
• Variable-speed WhisperFlo VST pumps
• IntelliFlo variable-speed pumps
• Pumps with different voltage requirements
• Pumps with different plumbing dimensions
• Pumps selected only by matching horsepower

A replacement pump must be matched according to hydraulic performance, voltage, phase, plumbing configuration, and application.

Maintenance Information

Routine maintenance may include:

• Inspecting and cleaning the strainer basket
• Checking the lid and lid O-ring
• Monitoring pump pressure and flow
• Inspecting for suction-side air leaks
• Checking motor ventilation openings
• Confirming proper motor rotation
• Inspecting electrical connections
• Monitoring for unusual vibration or noise
• Maintaining correct pool-water chemistry

Always disconnect and lock out electrical power before servicing the pump.

Warranty Information

The Pentair WhisperFlo pump is covered according to Pentair’s applicable limited warranty terms.

Warranty eligibility may depend on:

• Purchase through an authorized Pentair dealer
• Professional installation
• Correct electrical wiring
• Proper voltage and phase
• Correct pump application
• Proof of purchase
• Compliance with Pentair installation instructions

Damage caused by incorrect voltage, improper phase configuration, incorrect motor rotation, dry operation, improper plumbing, freezing, flooding, electrical surges, chemical damage, or unauthorized repair may not be covered.

Customer-Facing Q&A

Q: Is this a variable-speed pump?
A: No. The 011642 is identified as a single-speed, 1.5 HP WhisperFlo pump.

Q: Does this pump operate on standard residential power?
A: Not typically. This model requires three-phase power and is intended for compatible commercial or professionally engineered electrical systems.

Q: What voltage does it use?
A: The motor is rated for 208–230/460V three-phase operation. It must be configured correctly for the available supply voltage.

Q: Can it replace a single-phase 1.5 HP WhisperFlo?
A: Not as a direct electrical replacement. The replacement must match voltage, phase, plumbing, and hydraulic requirements.

Q: Does motor rotation need to be checked?
A: Yes. Three-phase motor rotation must be verified during startup to ensure the pump is operating in the correct direction.

Q: Is the pump self-priming?
A: Yes. The WhisperFlo is designed as a self-priming pool pump when installed and operated correctly.

Q: Is professional installation required?
A: Yes. A qualified pool professional and licensed electrician should verify the hydraulic and electrical installation.

Q: Are unions included?
A: Do not assume unions or plumbing adapters are included unless specifically shown in the manufacturer’s packaging.