NorthStar NSQ Series 12V On-Demand Sprayer Diaphragm Pump - 5.5 GPM @ 60 PSI 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 Patent-pending DXS-3 valves are made with chemical-resistant Viton for faster priming, better performance and longer life Santoprene diaphragm for reliability and longer life 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 Patented DXS-3 valves are made with chemical-resistant Viton for faster priming, better performance and longer life Santoprene diaphragm for reliability and longer life Innovative smooth valve design for faster priming and longer life Fiberglass reinforced polypropylene pump manifold for superior durability and resistance to chemicals Compatible with Roundup agricultural brand herbicides All components in fluid path have been tested and approved for Roundup use Self-priming up to 12 feet above liquid level 12 Volts Standard mounting pattern Fits all NorthStar sprayers and most other brands