The VacuMaster Series Vacuum Pumps Provide Power and capacity for a wide range of service applications. High CFM rating for fast, thorough evacuation and two-stage rotary vane design cleans the system more thoroughly than a single-stage pump; the second stage starts pumping at a lower pressure so you can pull a deeper, ultimate vacuum. The oil Drain Valve has been positioned at the bottom of the oil reservoir and angled for faster, more complete draining. The Oil Fill Port makes adding oil simple since the port is accessible from the front or either side. The sight glass on the front of the pump shows you the condition of the oil and when enough oil has been added. The Heavy-Duty High torque Motor was designed for easy startup and efficient operation. Die-Cast Aluminum Housing cast aluminum housings make the pumps lightweight but durable.