This on demand electric diaphragm water pump uses 12V to power the 2 pistons that drive the diaphragm. Used primarily for spraying and transferring water on demand, it can produce a maximum flow of 4L/min. Our diaphragm water pump comes with a built in pressure switch, which causes the pump to start running when there is a drop in pressure in the line. Fully self priming to 2m, with a maximum run time of 30 minutes, it is suitable for a number of uses. The EDPM diaphragm is compatible with agricultural chemicals and the pump can be run dry. Common uses of this pump include: ATV mounted spayers, horticultural spraying equipment, portable water systems, pole window cleaning.