The Robinair 15600 is a CoolTech 2-Stage Vacuum Pump. It has heavy-duty motor and high torque design for easy startup and efficient operation. The oil fill port makes adding oil simple since the port is accessible from the front or either side. It has a sight glass on the front of the pump which shows user when enough oil has been added. The durable polycarbonate mobile base improves pump balance and minimizes vibration during operation. Gas ballast moisture laden air passing through the pump mixes with relatively dry air to such a degree that compression does not cause condensation. Its two-stage design cleans the system more thoroughly than a single-stage pump; the second stage starts pumping at a lower pressure so user can pull a deeper, ultimate vacuum.

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More info: Robinair 15600 CoolTech 2-Stage Vacuum Pump, 1/2 HP, 6 CFM