Harwil Q12DS Cal Spa Flow Switch (Q12DS/CAL SPA) pumpmotors Helps regulate air flow in

Helps regulate air flow in compatible spa systems

Matching the correct 5 inch indoor draft hood helps preserve proper fit and cleaner vent-related service results

it helps streamline installation and reduce uncertainty

A seal plate gasket helps create a seal between compatible pump components

Harwil Q12DS Cal Spa Flow Switch (Q12DS/CAL SPA) pumpmotors Helps regulate air flow inA flow switch helps confirm water movement in a compatible spa system so related equipment can operate under the correct conditions, and this Harwil Q12DS version is intended for Cal Spa applications using the Q12DS CAL SPA reference. Flow sensing is especially important in spa systems where heaters and controls depend on dependable circulation confirmation. This switch has practical value because it is matched to a specific application family,