The air vacuum pump is a venturi-type AC pump that eliminates moisture from air-con systems, making it safe and easy to add refrigerant. The surroundings vacuum pump is easy to work and pulls complete vacuum within two minutes of being connected to an air collection. Contains 1/2 in. ACME (R134a) and R12 connectors.

Air-powered vacuum pumps work when compressed air moving via an orifice increases its velocity and lowers its air pressure. Ambient surroundings is drawn in through stations in the generator, creating suction and vacuum. The air stream exits through the exhaust. … These functions require vacuum pumps.