Get the power and performance you need with the Delavan extreme duty on-demand diaphragm pump. This pump operates as an on-demand pump. As an on-demand pump, it uses a demand switch that operates only when liquid flow is required. This built-in pressure switch automatically starts and stops the pump at specific pressure settings. The 12-volt permanent magnet motor is thermally-protected and splash-proof, plus this diaphragm pump has a maximum flow rate of 2 gallons per minute. This diaphragm pump has a 3-chamber positive displacement, can be run dry and has excellent self-priming capabilities. The extreme-duty pump withstands oil and diesel blends and lasts longer than other pumps when spraying harsh chemicals. This particular Delavan on-demand pump runs liquid at 140 degrees F maximum. With this pump from Delavan, you don't have to worry about a thing.