Flow Switch, Harwil Q12DS, 1/2"mpt, 2A

Harwil Q12DS Flow Switch 1/2" NPT with 2 amp pilot duty switches. Switches on at 10 gpm and switches off at 8 gpm. ABS body, stainless spring arm. Used to protect your spa from heating without circulation. When this switch fails your hot tub may show error codes like FLO, FL, OH, FL1, FL2 or it may simply stop heating.


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