Vantare does not use the tank monitor model that controls pump or fresh fill. The unit is strictly for tank level indicating and is located in the upstairs MDP cabinet. There is a float switch near the top of the fresh water tank that shuts off the auto-fill valve circuit. Also, to calibrate the Headhunter units, the adjustments are on the back of the display, not on the sending unit located on the side of the tanks. Hope this helps.