This Hilmor Vacuum Pump 5CFM is the perfect pump for anyone who works with heating, ventilation and cooling systems. This device is lightweight, conveninet, and allows for hands-free carrying. The user-friendly oil change systems includes a sloped and channeled housing that drains oil quickly, easy access to a large oil fill pot, and a sight glass allowing for quick identification of oil levels. Blank-off valve seperates pump from the rest of the system, ensuring accurate vacuum readings and no loss of vacuum when changing the oil. The gase ballast removes moisture therefore prolonging the oil life. Can also be used in a variety of industrial settings. This model has been retooled to make evacuation as easy as possible. Details: 1/2 HorsePower, 120 Volts, 11 oz. Oil Capacity, 7.5 amps, 3440 RPM.