SHURflo On-Demand Diaphragm Pump - 5.3 GPM, 60 PSI, 12V, Model# 5059-1310-D012 Designed for spraying and pumping herbicides, pesticides, liquid fertilizers and hard-to-handle fluids Highly durable automatic-demand pump features a field-proven pump head design driven by a 12-volt, continuous duty, sealed motor Can be run dry without damage Santoprene diaphragm and Viton valves for chemical resistance and maximum lifespan Built-in pressure switch, set at 60 PSI, to protect the unit in the event of dead-heading