The EF4000 Everflo 12-volt diaphragm pump from Water Cannon Inc. - MWBE is ideal for fluid transfer applications, agricultural sprayers and spot sprayers. The lightweight and versatile pump comes equipped with a polypropylene housing and valve plate, Viton valves, and a Santoprene diaphragm. It also features a low-demand switch that automatically turns the pump on and off as flow is required. This feature eliminates the need for a pressure regulator or bypass valve, making it more efficient. Power is only used when the pump flow is in demand. It is self-priming up to 8 feet and has a maximum fluid temperature of 140 degrees F. 800-333-9274; www.watercannon.com.