Harwil Q12DS Flow Switch 1/2" NPT 2 amp pilot duty switches on at 10 gpm and switches off at 8 gpm. ABS body, stainless spring arm Kit includes one each 60-555-1225, 1/2" strain relief connector&one 1/2"fpt x 1/2"fpt coupling.
Stationary arm measurements:
2" Distance between end of the arm and bottom of the threads
2-5/8" Distance between end of the arm and top of the threads