Liquid Flow Detector
Rated at one amp normally open switch
8-12gpm required flow for switch point

This is a universal replacement kit for Q12-DS Harwil Flow Switches. It contains a Q12DS Flow switch, a threaded adaptor, and a cord compression adaptor to allow reattachment of your original cord.

Model 1 Liquid Flow Detector
1-1/2" pvc s x s, rated 1 amp, mount horizontal only. 14gpm minimum flow required

Model 2 Liquid Flow Detector
1-1/2" pvc s x s set point 8-12gpm, pilot duty only

Model 25 Liquid Flow Detector
1-1/2" pvc s x s, rated 25 amps, mount horizontal only. 14gpm minimum flow required