Rule-Mate Automatic Submersible Bilge Pumps 1500GPH, 12V

RuleMate bilge pumps have built-in programming that can sense when the pump is running but not pumping water to protect the pump, vessel, and the vessel’s batteries. If debris fouls the sensor or the pump becomes air-bound, the pump will stop running and begin to “check” for water every 2-1/2 minutes. Once the debris is removed, the pump will revert to its normal operation, turning on when the water reaches approximately 7cm and shutting off at 1.5cm