Pentair WhisperFlo 0.75 HP Impeller (073127Z) waterfall Part number 9-100-1021 helps confirm

Part number 9-100-1021 helps confirm the correct replacement item

The kit format gives this part practical value because it pairs two related gate functions in one matched package rather than requiring separate part sourcing

Useful when the original blower is failing or nonfunctional

An injector fitting is useful because it helps introduce CO2 into the system in a controlled way

Pentair WhisperFlo 0.75 HP Impeller (073127Z) waterfall Part number 9-100-1021 helps confirmRestore confident water movement in compatible Pentair pump systems with this 0. 75 HP impeller replacement. The impeller is the performance point inside the wet end, helping convert motor rotation into the flow needed for filtration, circulation, and equipment operation. This component is a strong choice when a worn, damaged, or incorrect impeller is affecting priming, pressure, or overall pump efficiency. Designed for the application shown in part