The hand-held vacuum pump is equipped with a switch, which permits to generate pressure or negative pressure, depending on its position.

If the switch is moved towards the outlet of the pump, negative pressure is generated during pumping. If the switch is moved towards the handle, positive pressure is generated during pumping. If the pump maintains positive or negative pressure in the system, then moving the switch will cause a return to the initial state.

The pump is equipped with accessories, which make it possible to use it on almost every motor or system.