Interlock Controllers

FIC-SF Interlock Controller

The FIC-SF Interlock controller is a fully custom designed swimming pool/spa equipment controller designed for use with sand filtration systems. The FIC-SF controller is designed to interlock the circulation, filtration, heat sources, ozone or ultra violet light generators, as well as all chemical treatment systems that are needed to safely and efficiently operate a commercial swimming pool/spa system. The FIC-SF Interlock controller links together all equipment within the system to operate together as one, ensuring proper start up, and shut down of all the equipment.

  • Control circulation pumps from one location
  • BACKWASH mode allows the circulation pumps to run while all associated pool equipment is disabled
  • COOL DOWN timer allows heaters and specialty equipment time to cool before stopping flow
  • EMERGENCY STOP function to immediately shut down circulation, chemical feeds, and all equipment with one button
  • Safely shut down all equipment in conjunction with the circulation pump
  • Bypass mode for maintenance and trouble shooting
  • Adheres to the CDC Model Aquatic Health Code
  • UL listed USA, CA
  • Custom design and fabrication

The pump control feature of the FIC-SF allows the operator to perform routine tasks in a faster more efficient manner. A programable timer shuts down heaters and specialty equipment before the circulation pump, allowing them to cool down by circulating water through them for a set amount of time before the pump shuts down. Backwash mode allows the circulation pump to be turned on by itself to perform a backwash of the sand filters while the rest of the pool/spa equipment remains disabled. When interlocked with the circulation pump VFD, the FIC-SF controller will automatically control the switching of pump speeds for filter, and backwash cycles, eliminating the need to operate valves to achieve the correct flow rate.


  • Centralized control of the entire system
  • Compatible with all manufactures equipment
  • Monitor system status from one location
  • Simple design and virtually maintenance free
  • Unequivocal layer of protection for swimmers, operators, and equipment