AquaCal AutoPilot ST-220 Fan Assembly (630-ST) calvertengineering Waterway Econo eyeball fitting

Waterway Econo eyeball fitting

and control response

This version is a practical choice when you need to keep the original threaded plumbing relationship intact

A pump basket is useful because it helps keep leaves and larger debris from reaching the impeller

AquaCal AutoPilot ST-220 Fan Assembly (630-ST) calvertengineering Waterway Econo eyeball fittingThe AquaCal AutoPilot ST 220 fan assembly is designed for compatible chlorination system applications where internal cooling airflow is needed to support the electronics. A fan assembly is useful because it helps reduce heat buildup inside the unit, which can contribute to steadier operation and better long term component protection. This replacement is especially useful when the original fan has become noisy, weak, seized, or completely