Two Stage Design – Cleans the system more thoroughly with a second stage vacuum, leading to a deeper ultimate vacuum level. Heavy Duty Motor – 1/3 H.P. motor featuring a rotary vane, sealed bearing, high torque design for easy startup and efficient operation. New Aluminum Reservoir Design – New cast aluminum reservoir reduces weight and creates a strong and durable pump. Brass Intake – Brass intake valve with 1/4″ and 3/8″ Flare and 1/2″ Acme adapters complete with tethered caps. Quick Oil Changes – Oil fill port and drain plug are easily accessible for fast and complete oil changes. Easy View Sight Glass – Clean oil is the key to efficient pump operation; oil color and level are easy to see with the oversized sight glass.