NorthStar Towable Boom Broadcast and Spot Sprayer - 16 Gallon, 2.2 GPM, 12 Volt 12V 2.2 GPM open flow NorthStar NSQ Series on-demand pump provides faster priming and longer life; 70 PSI max. 100% continuous duty rating Honeywell MICRO SWITCH for enhanced durability and efficiency Santoprene diaphragm and Viton valves for superior reliability and chemical resistance Unique pressure switch design slowly cycles the pump for less switch and motor wear