Robinair (15800) VacuMaster Economy Vacuum Pump - 2-Stage, 8 CFM Free air displacement: 8 CFM. Nonskid pads 8 CFM free air displacement; factory rated to 35 microns Intake fitting: 1/4 inch MFL and 3/8 inch and 3/8 inch MFL, 3/8 inch FFL x 1/2 Acme adapter Oil capacity, Voltage: 115V, 60 Hz Kindly refer the user manual and video for troubleshooting steps.