Pentair Air Flow Switch Kit, for Heater | 42001-0061S Jack's Magic It is often replaced during

It is often replaced during full spa remodels

Routine inspection helps determine when full assembly replacement is required

The WFK series supports dependable water circulation

High Density Polyethylene Weave

Pentair Air Flow Switch Kit, for Heater | 42001-0061S Jack's Magic It is often replaced duringWhat This Part Is Used For The Pentair 42001 0061S Air Flow Switch Kit is used in compatible Pentair heaters to monitor proper airflow. It helps ensure safe heater operation by verifying adequate ventilation. Why This Part Matters A faulty air flow switch can prevent ignition or cause heater shutdown. Replacing the switch helps restore safe startup and consistent heating performance. Proper airflow monitoring protects heater components from damage.