The Liquidynamics family of Electric Oil Pumps are designed to provide an effective alternative solution to pumping viscous fluids such as engine and gear oil, as well as non-viscous fluids such as hydraulic fluid, transmission fluid and 100% (non-mixed) antifreeze. Pumps are intended for indoor use only. Available models include the ability to operate ôon demandö when the discharge valve is opened and then shut-off automatically when the discharge valve is closed. 3/4ö NPTF inlet x 1/2ö NPTF outlet (3/4ö outlet, model 70). Advantages to using Electric Oil Pump includes; air compressor not required, quiet operation, non-pulsating flow for improved metering and reduced maintenance. Please contact Liquidynamics to ensure correct pump choice for your specific application. Variables to consider when choosing an electric pump include fluid viscosity, fluid temperature, plumbing length, plumbing diameter, suction distance and any pertinent restrictions such as hose reels, control valves, elbows, etc.