Product Overview

The Pentair 354816S Replacement Pump Motor is a heavy-duty, single-speed motor designed for select Pentair and Sta-Rite pool pump applications. It delivers 2 horsepower of dependable power and operates on a 208–230-volt, single-phase electrical supply.

This motor features a 56Y square-flange frame and a Totally Enclosed Fan Cooled enclosure, commonly abbreviated as TEFC. Unlike an open drip-proof motor, the TEFC design prevents outside air from passing directly through the motor’s internal components. This helps reduce exposure to moisture, dust, debris, salt air, and other corrosive conditions commonly found around pool-equipment areas.

Part 354816S is supplied as a replacement motor only. It does not include the complete pump, wet end, impeller, diffuser, seal plate, mechanical shaft seal, or other hydraulic components.

Because pump motors with the same listed horsepower can have different service factors, frame styles, shaft configurations, and electrical requirements, compatibility must be confirmed before ordering.

Key Features

• Genuine Pentair replacement pump motor
• Rated at 2 horsepower
• Single-speed operation
• Single-phase electrical configuration
• 208–230V operating voltage
• 56Y motor frame
• Square-flange mounting configuration
• Totally Enclosed Fan Cooled construction
• Heavy-duty black motor housing
• Designed for demanding outdoor pool-equipment environments
• Helps reduce internal exposure to moisture and airborne contaminants
• Direct replacement for Pentair part number 354816S
• Suitable for select Pentair, Challenger, WhisperFlo, and Sta-Rite pump applications

Benefits

• Restores operation without replacing the complete pump
• TEFC construction offers improved protection in harsh environments
• Helps reduce corrosion inside the motor
• Single-speed design provides straightforward operation
• Square-flange frame attaches directly to compatible pump seal plates
• Genuine Pentair construction supports proper fitment
• Heavy-duty enclosure is suited for residential and commercial pool applications
• Allows the existing compatible wet end to remain in service
• Large wiring compartment supports easier professional installation

Specifications

Compatibility Information

Pentair part 354816S is associated with select Pentair and Sta-Rite pump configurations that use a 2 HP, 208–230V, single-phase, 56Y square-flange TEFC motor.

Potential applications may include select:

• Pentair Challenger pump configurations
• Pentair WhisperFlo pump configurations
• Pentair high-pressure pool pump configurations
• Pentair high-flow pool pump configurations
• Sta-Rite Max-E-ProXF pump configurations
• Other Pentair or Sta-Rite pumps originally equipped with motor 354816S

Compatibility must be confirmed using the original motor part number, pump model, service factor, total horsepower, voltage, frame, flange, and shaft configuration.

Do not order based only on the 2 HP rating.

What Is Included

• One Pentair 354816S replacement motor

The following parts should not be assumed to be included:

• Pump housing or wet end
• Motor mounting hardware
• Seal plate
• Mechanical shaft seal
• Impeller
• Diffuser
• Gaskets or O-rings
• Pump base
• Electrical conduit or wiring
• Automation or control equipment

A new mechanical shaft seal should normally be installed whenever a pool pump motor is replaced.

Installation Information

Installation must be performed by a qualified pool professional or licensed electrician. The electrical supply must be disconnected and locked out before removing the existing motor.

Before installation, confirm:

• The supply voltage is 208–230V.
• The electrical circuit is single phase.
• The replacement motor uses the correct 56Y frame.
• The pump requires a square-flange motor.
• The original motor horsepower and service factor match.
• The existing impeller is compatible with the replacement motor.
• The circuit breaker, wiring, bonding, and grounding meet code.
• The motor rotates freely after assembly.
• The pump shaft seal and sealing components are replaced as needed.

The motor must be properly bonded and grounded according to the National Electrical Code and all applicable local requirements.

Never operate the pump without water. Running the pump dry can damage the mechanical seal, pump housing, and other internal components.

Confirm Before Ordering

• Confirm Pentair part number 354816S.
• Verify the original motor is rated for 2 HP.
• Confirm a 208–230V electrical supply.
• Verify the installation is single phase.
• Confirm the motor frame is 56Y.
• Verify the pump uses a square-flange motor.
• Compare the original motor service factor and total horsepower.
• Confirm the shaft and impeller configuration.
• Do not select a replacement motor based only on horsepower.
• Determine whether a new mechanical seal is required.
• Inspect the impeller, diffuser, seal plate, and O-rings.
• Confirm that only the motor is needed, not the complete pump.
• Have the motor professionally installed and electrically tested.

Warranty Information

This genuine Pentair replacement motor is covered under Pentair’s applicable limited replacement-parts warranty.

Warranty eligibility may depend on purchase through an authorized dealer, correct product compatibility, professional installation, proper voltage, correct wiring, adequate ventilation, proper bonding and grounding, and maintenance according to Pentair requirements.

Damage caused by incorrect voltage, improper wiring, water intrusion, incorrect impeller sizing, dry operation, blocked ventilation, freeze damage, chemical exposure, unauthorized modification, or improper installation may not be covered.

Keep the original purchase receipt and professional installation invoice for warranty purposes.

Customer Q&A

Is 354816S a complete pool pump?
No. It is a replacement electric motor only. The pump wet end and hydraulic components are not included.

What horsepower is this motor?
The motor is rated at 2 HP.

What voltage does it require?
It operates on a 208–230V electrical supply.

Is it single phase or three phase?
Part 354816S is a single-phase motor.

Is this a variable-speed motor?
No. It is a single-speed replacement motor.

What frame does it use?
It uses a 56Y square-flange frame.

What does TEFC mean?
TEFC means Totally Enclosed Fan Cooled. The enclosure helps protect the motor’s internal components from outside moisture, dust, and contaminants.

Does it fit every 2 HP Pentair pump?
No. Horsepower alone does not determine compatibility. The frame, flange, voltage, phase, service factor, shaft, and original motor number must also match.

Should the pump seal be replaced with the motor?
Yes. Installing a new compatible mechanical shaft seal during motor replacement is strongly recommended.