Swimables

Swimables 1HP Impeller for WhisperFlo Pumps

SKU: SW-21-003 UPC: 810108823148
Regular price $48.95
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Quick Facts
1 HP manufacturer designation
Replacement reference 073128
For matched WhisperFlo pumps
Aftermarket part by Swimables
Confirm exact impeller number
Key Benefits +
  • Replaces a damaged 073128 impeller in correctly matched pumps.
  • Provides the rotating component that moves water through the pump.
  • The exact replacement reference helps prevent ordering by horsepower alone.
  • Supports repair of the pump's internal hydraulic assembly without purchasing a complete pump when the other components are serviceable.
How to Use +
1 Have a qualified pool technician confirm the existing impeller reference and pump configuration. The technician should isolate power and follow the pump manufacturer's service instructions before opening the pump. Inspect the shaft seal, diffuser and gaskets during service and replace worn components with the correct parts. After reassembly, follow the manufacturer's priming and startup procedure and check for leaks and normal circulation.
Specifications +

Manufacturer: Swimables

Manufacturer part number: SW-21-003

Industry replacement reference: Pentair 073128

Manufacturer horsepower designation: 1 HP

Product type: Internal pool pump impeller

Pump family: Pentair WhisperFlo

WhisperFlo model references for 073128: WFE-4, WFE-26, WF-4, WF-26, WFK-4, WFDS-4 and WFDS-26

Fit requirement: Match the original impeller number, pump model and motor configuration

UPC: 810108823148

Buy with Confidence from Benchmark Pool Supply +

Order the Swimables SW-21-003 from Benchmark Pool Supply with its 073128 replacement reference clearly identified. Confirm your existing impeller number and pump configuration before purchase so the replacement matches your equipment.

Buy with Confidence from Benchmark Pool Supply

  • Trusted pool professionals
  • 100% Genuine Manufacturer Parts Guaranteed
  • Shipping options for eligible products
Returns subject to product eligibility
Expert Product Support
Full Product Description +

Consistent circulation starts at the impeller. The Swimables 1HP Impeller Replacement (073128 / SW-21-003) is a precision-engineered replacement designed specifically for Pentair WhisperFlo® pool pumps operating at 1 horsepower. When an impeller becomes worn, cracked, or partially blocked, the pump may experience reduced flow, loss of efficiency, and increased motor stress.

This impeller restores proper hydraulic performance inside the pump, allowing water to move efficiently through the filtration and circulation system. Manufactured to OEM-equivalent specifications, it provides a reliable, cost-effective alternative to factory-branded impellers while maintaining proper fit and performance.

The Swimables 1HP impeller is commonly replaced during pump rebuilds, seal replacements, or when troubleshooting low flow or pressure issues.


Restores Proper Flow and Circulation Efficiency

The impeller converts motor rotation into water movement. Even minor wear can significantly reduce circulation and affect filtration, heating, and cleaner performance.

The Swimables 1HP impeller restores proper flow and pressure, helping the pump operate efficiently and maintain stable circulation throughout the pool system.


Designed for Pentair WhisperFlo® Pumps

This impeller is engineered specifically for compatibility with Pentair WhisperFlo® pumps configured with a 1HP motor. Accurate thread engagement and balanced construction ensure smooth installation and reliable operation.

Using the correct impeller helps prevent cavitation, vibration, and premature wear on seals and bearings.


Durable Construction for Long-Term Reliability

Pool pump impellers operate continuously under load in chemically treated water. The Swimables impeller is constructed from durable materials designed to resist erosion, cracking, and deformation over time.

Its balanced design supports smooth rotation and reduces stress on the motor shaft and mechanical seal.


Why Replacing a Worn Impeller Matters

A failing impeller can compromise the entire circulation system.

Replacing the impeller helps:

  • Restore proper water flow and pressure

  • Prevent motor overheating and excessive wear

  • Improve filtration, heater, and cleaner performance

  • Extend the overall life of the pump

Routine impeller replacement is an important part of pump maintenance.


Product Specifications

Specification Details
Product Name Swimables 1HP Impeller
Part Number 073128
Manufacturer Part SW-21-003
SKU SW-21-003
Manufacturer Swimables
Horsepower Rating 1 HP
Compatible Pumps Pentair WhisperFlo®
Pump Type Pool circulation pump
Function Generates water flow and pressure
Installation Internal pump impeller replacement

Buy with Confidence from Benchmark Pool Supply

When you purchase the Swimables 1HP Impeller Replacement from Benchmark Pool Supply, you’re buying from a locally owned pool supply retailer that understands pump repair, compatibility, and real-world service needs.

Benchmark Pool Supply supports homeowners and service professionals with quality replacement parts, knowledgeable assistance, and convenient online ordering with in-store pickup. We stock the components that keep pool systems operating efficiently and reliably.

Swimables 1HP Impeller for WhisperFlo Pumps
Regular price $48.95

Frequently Asked Questions

What does the Swimables 1HP impeller do?

What does the Swimables 1HP impeller do?

The Swimables 1HP impeller generates water flow and pressure inside Pentair WhisperFlo pool pumps.
Which pumps is this impeller compatible with?

Which pumps is this impeller compatible with?

Swimables cross-references SW-21-003 to Pentair impeller 073128. Use it only in WhisperFlo pumps whose parts list specifies that impeller. Confirm the complete pump model and motor configuration; horsepower alone does not establish fit.
What are signs an impeller needs replacement?

What are signs an impeller needs replacement?

Reduced flow can have several causes, including blocked plumbing, a dirty filter or an obstructed or damaged impeller. Have the pump diagnosed and the impeller inspected before ordering a replacement; symptoms alone do not confirm an impeller fault.
Is this an OEM part?

Is this an OEM part?

No. This is a Swimables aftermarket replacement cross-referenced to Pentair 073128, not a Pentair-branded OEM part.
Should other parts be replaced during impeller installation?

Should other parts be replaced during impeller installation?

It’s recommended to inspect or replace pump seals and gaskets when servicing the impeller.