Swimables Impeller for Pentair Pumps 1 HP Full Rated

Key Benefits + Pump Compatibility

• Swimables replacement impeller for compatible Pentair and Sta-Rite pool pump wet ends
• Designed for 1 HP full-rated / 1.5 HP up-rated applications
• Cross-references to Pentair impeller 355074
• Documented for compatible Pentair SuperFlo and Sta-Rite SuperMax pumps
• Also associated with select Pentair Challenger and Pinnacle pump applications
• Replaces a worn, damaged, cracked, or failed impeller without replacing the complete pump

Current replacement-parts documentation identifies SW-21-303 as the Swimables replacement for Pentair 355074 and describes it as a 1 HP full-rated / 1.5 HP up-rated pump impeller.

Quick Product Summary

The Swimables SW-21-303 Pump Impeller is an aftermarket replacement for Pentair-style impeller 355074. It is designed for compatible pump configurations using a 1 HP full-rated or 1.5 HP up-rated hydraulic setup, including documented Pentair SuperFlo and Sta-Rite SuperMax applications. The impeller mounts inside the pump wet end and spins with the motor shaft to move water through the circulation system. Before ordering, verify the pump model, existing impeller number, motor rating, and hydraulic configuration rather than selecting an impeller by motor horsepower alone.

Best For

• Pentair SuperFlo pump repairs
• Sta-Rite SuperMax pump repairs
• Select Pentair Challenger applications
• Select Pentair Pinnacle applications
• Replacing Pentair-style impeller 355074
• 1 HP full-rated / 1.5 HP up-rated pump configurations

Part 355074 is documented for Pentair Challenger, SuperFlo, and related pump applications, while current SW-21-303 listings cross-reference that same impeller.

Why This Matters

• The impeller determines how the pump converts motor rotation into water flow
• Using the wrong impeller can create an incorrect hydraulic load for the motor and pump wet end
• Matching the original impeller number is more reliable than matching horsepower alone
• A worn or damaged impeller can contribute to reduced circulation
• Inspecting the diffuser and shaft seal during repair can help identify additional worn components

Common Signs You Need This / Use This When

• The existing impeller is cracked or physically damaged
• Impeller vanes are worn or obstructed
• Pump service confirms that the impeller requires replacement
• Your existing impeller cross-references to 355074
• Your pump configuration requires the 1 HP full-rated / 1.5 HP up-rated impeller
• You are rebuilding a compatible SuperFlo, SuperMax, Challenger, or related pump wet end

Product Specifications

The SW-21-303 cross-reference to 355074 is supported by current replacement-parts listings. Pentair 355074 is also documented as a 1 HP full-rated Challenger / 1.5 HP SuperFlo-style impeller.

Compatibility / Fitment Notes

Do not select SW-21-303 by motor horsepower alone. Pump manufacturers may use full-rated, up-rated, service-factor, and total-horsepower configurations that can make two motor labels look different even though the hydraulic setup is related.

Current replacement data associates SW-21-303 / 355074 with compatible:

• Pentair SuperFlo
• Sta-Rite SuperMax
• Pentair Challenger
• Pentair Pinnacle

For the safest replacement, verify the existing impeller number, pump model, motor label, and diffuser configuration before ordering.

Also note that SW-21-303 should not be confused with Swimables SW-21-003. Swimables officially identifies SW-21-003 as the WhisperFlo-style 1 HP impeller replacing Pentair 073128.

Installation / Use Notes

Turn off power to the pool pump at the breaker before servicing. The pump must be electrically isolated before the wet end is opened.

Remove and replace the impeller according to the service procedure for the exact pump model. Inspect the mechanical shaft seal, diffuser, diffuser seal, and other wet-end components while the pump is disassembled. Confirm that the replacement impeller matches the original hydraulic configuration before reassembly.

Professional installation is recommended when pump compatibility or electrical isolation is uncertain.

Buy with Confidence

Benchmark Pool Supply helps customers identify pool pump parts using manufacturer numbers, pump models, motor ratings, and practical service knowledge. Impellers can look nearly identical while being designed for different hydraulic loads, so matching SW-21-303 / 355074 before ordering can help prevent an incorrect pump repair.