Part # 5074-27B
Manufacturer Code 073128
Dimensions 4.975" X 0.5"
Pentair® WhisperFlo® Impeller – 1.0 HP Full Rate / 1.5 HP Up-Rated – 073128
✅ Genuine Pentair® OEM Replacement Part
⚠️ For Use with Pentair® WhisperFlo® and IntelliFlo® Pumps
➡️ Matched for 1 HP Full-Rate or 1.5 HP Up-Rated Motor Applications
The Pentair® 073128 Impeller is an original equipment replacement part designed for use with WhisperFlo® and compatible IntelliFlo® pumps. This impeller is precision-balanced and engineered to deliver optimal flow and pressure performance for systems using a 1.0 HP full-rated motor or 1.5 HP up-rated motor.
Key Features:
• Designed for 1 HP Full / 1.5 HP Up-rated pump systems
• Molded from high-strength, corrosion-resistant thermoplastic
• Closed-face impeller design for improved hydraulic efficiency
• OEM-fit ensures consistent performance and quiet operation
Pentair OEM Part Number: 073128
• Horsepower Rating: 1.0 HP Full, 1.5 HP Up-Rated
• Pump Type: WhisperFlo® and select IntelliFlo®
• Mounting: Threaded shaft (fits 56Y square flange motors)
Compatible With:
• Pentair® WhisperFlo® Standard and High Performance Pumps
• Pentair® IntelliFlo® models with matching wet end configurations
(Always verify pump model, motor rating, and diffuser compatibility.)
Installation Tip:
Replace the shaft seal and diffuser o-ring during impeller replacement. This impeller is typically paired with diffuser #072927.
Frequently Bought with this Impeller
RTV Silicone (For Gluing Seal Into Plate)
I'm having a hard time replacing this, do you have any information on how to remove it?
Reply
You can take a look at our how to guide here: http://www.inyopools.com/HowToPage/how_to_replace_a_pool_pump_impeller.aspx.
Reply
Will this impeller (073128) fit the WFK-4 1hp 3-phase Pentair Whisperflo pump?
Reply
Yes, Pentair part number 073128 is the correct impeller for the WFK-4. It will also work on the WFE-4, WFE-26, WF-4, WF-26, WFDS-4, WFDS-26.
Reply
Does this impeller come complete with screw to attach it to the motor shaft, or does the screw have to be purchased separately?
Reply
The Most Recent Reviews
(5 out of 5 stars)
Reviewed By: Inyo Customer ()
Part fit perfectly.I am a retired HVAC technician,so I am familiar with rebuilding commercial pumps.Was well within the scope of a DIY project.
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(5 out of 5 stars) Impeller is held in by LEFT handed screw
Reviewed By: Inyo Customer ()
This is slightly thicker than my original to handle the extra HP. IMPORTANT***: I thought my old screw holding my old impeller was stuck until one video said left hand screw!
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(4 out of 5 stars)
Reviewed By: chief D. from Wauchula, FL ()
have not received info on return of impeller yet. promised to have by wednesday. otherwise service was good.
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(5 out of 5 stars)
Reviewed By: Phantom from South Euclid, OH ()
Pros: Fits Pentair Superflow
Impeller worked on the Pentair SuperFlow 1 HP pump. Works great
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