Designed for spraying and pumping herbicides, pesticides, liquid fertilizers and hard-to-handle fluids, this highly durable SHURflo On-Demand Diaphragm 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.