Pentair WhisperFlo® Impeller | WhisperFlo & IntelliFlo i1 Pumps | 073128Z

The Pentair WhisperFlo® Impeller (073128Z) is the OEM replacement impeller for WhisperFlo inground pumps and the IntelliFlo i1 Variable Speed Pump.

The impeller is the rotating component at the heart of your pump's hydraulic assembly. It draws water in through the strainer housing and accelerates it outward through centrifugal force, generating the flow that drives your entire circulation system. A worn, cracked, or clogged impeller reduces flow rate, strains the motor, and can cause the pump to lose prime. Replacing it with the correct OEM part restores designed hydraulic performance. Match the part number stamped on your existing impeller before ordering — the WhisperFlo line spans multiple HP ratings, each with its own impeller.

Specifications

Fits Into

Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering.

Pro Tip

WhisperFlo pumps span a wide range of horsepower configurations, and each HP rating uses a different impeller. Before ordering, locate the part number molded directly onto your existing impeller — it will confirm you have the correct version (073128Z) and not an adjacent size. If the pump is also being opened for a seal replacement, this is the right time to inspect the diffuser and replace the pump lid O-ring as a set, avoiding a second teardown.