Each pump on this system utilizes a dual float switch.
The dual float switch on the primary pump contains two large floating rings enclosed within a protective cage. Water will lift the bottom float by ��, which will activate the pump. If for any reason the lower float does not activate the pump, the water will rise to the second float, and it will activate the pump. As the pump
evacuates the water from the pit, the floats will drop. The pump will run for an additional 10 seconds to extend the cycle after the lower float drops. The blue controller for the primary pump powers this switch.
During a power outage, or when more water is entering the sump than the primary pump can handle, the backup pump will automatically begin pumping. It also has a dual float switch, so if one float fails to activate the pump, the second float will activate the pump as soon as the water reaches that level. As the water
recedes below the float switch, a timer in the control unit will run the pump an additional 25 seconds to empty the pit.
This is probably one of the better high output combo systems that we carry and I would highly recommend it.