The Robinair Advantage-On big jobs use multiple units, instead
of one big unit, for added flexibility, less cost.

• Ideal for larger system evacuation. It combines Robinair’s proven offset
  rotary vane design with features that make the pump easy to use.
  
• A real workhorse, the 15120A is rated at a full 10 cfm to help you reach
  deep vacuum conditions more quickly, saving time and ensuring adequate
  moisture removal.
  
• One-piece Sure-Grip molded handle houses the on-off switch, protecting it
  from accidental knocks.
  
• The powerful 1/2 hp motor features a high torque design for easier starting
  and built-in motor overload protection. An integral check valve prevents pump
  oil from being sucked into the system if power is lost.
  
• Offset rotary vane design creates the deep vacuum conditions needed for
  thorough evacuation.
  
• Large sight glass makes it easy to check vacuum pump oil levels.
  
• Gas ballast helps keep pump oil clean for more efficient operation.
  
• Iso-Valve isolates the pump from the system after evacuation, making it
  simple to check for rate of rise.
  
• Oil fill port is easy to reach from either side, and the oil drain is located at the
  bottom of the reservoir and angled downward for complete draining.
  
• External exhaust allows vapors to be captured or piped away.