AquaCal AutoPilot ST-220 Fan Assembly (630-ST) calvertengineering supporting safer and more dependable

supporting safer and more dependable operation of connected equipment

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

and control response

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

and surface-contact cleaning

AquaCal AutoPilot ST-220 Fan Assembly (630-ST) calvertengineering supporting safer and more dependableThe 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