• Designed with the Iso-Valve, which isolates pump from system, making it easy to measure rate of rise.
• Gas ballast feature helps keep oil clean for longer time by introducing a small amount of dry atmospheric air to prevent condensation of moisture within the pumping chamber.
• 1/4" and 1/2" MFL intake fitting
• 2-stage
• 1/2 HP motor

Its offset rotary vanes work in conjunction with vacuum pump oil to create a powerful compression inside the pumping chamber.