NorthStar NSQ Series 12V On-Demand Diaphragm Pump with Quick-Connect Ports - 2.2 GPM @ 70 PSI 100% continuous duty rating with no cool down period required Automatically turns off when no flow is required to conserve battery power Honeywell MICRO SWITCH for enhanced durability and efficiency Unique pressure switch design slowly cycles the pump for reduced switch and motor wear Santoprene diaphragm and Viton valves for reliability, longer life and better priming