A dispensing unit for dispensing a beverage from a pressurized container having a tapping column fixed to and extending normal to the top surface of a top plate with an opening and forming an elbow is disclosed. The column has an elongated inner channel bringing in fluid communication the support plate with a tapping pinch valve located in a tapping head at the elbow. The tapping pinch valve has jaws for receiving in pinching relationship the outlet end of the dispensing line and controlling flow of liquid by varying the distance between the jaws from a closed to an open position. A flexible dispensing line, having inlet and outlet ends, extends in the channel. The outlet end engages the pinch valve, and the inlet end connects to a keg. A device for opening the channel includes the pinch valve so a distance larger than the open position separates the jaws.