AquaCal AutoPilot ST-220 Fan Assembly (630-ST) calvertengineering The 1 inch slip connections

The 1 inch slip connections help preserve the intended plumbing and assembly relationship

This replacement is especially useful where the original top mount valve has failed or where the plumbing layout benefits from easier future access through the union connections

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

An impeller is useful because it helps drive water through the pump housing

supporting safer and more dependable operation of connected equipment

AquaCal AutoPilot ST-220 Fan Assembly (630-ST) calvertengineering The 1 inch slip connectionsThe 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