MaxEvac™ MEVP7S and MEVP14S sparkless vacuum pumps are A2L compatible and designed to maximize your evacuation efficiency. The high-capacity intake fitting has dual 3/8″ connections in a Y shape to increase flow. The gas ballast allows dry atmospheric air to enter the second stage chamber and prevent water vapor from condensing before it is exhausted from the vacuum pump. This extends the life of the vacuum pump oil which means fewer oil changes. *U.S. and International Patent Pending.