12 Volt DC Diaphragm Pump For a wide variety of low pressure applications. Pumps are available in 12/24/115 Volt with EPDM, Viton® or Santoprene internals. Adjustable demand switch for automatic shut-off or internal by-pass without a switch. Maximum temperature is 170° F. 12 Volt DC Diaphragm Pump, No Switch, *3.3 Max GPM, 50 Max PSI, 1/2" MPT Ports, Viton Valve, Santoprene Diaphragm