A beverage dispensing system comprising a cleaning unit for supplying a cleaning liquid to the beverage dispensing system, said beverage dispensing system comprising one or more sealable pressure chambers, each defining a beverage container or containing a beverage container, said one or more pressure chambers being in fluid communication with one or more tapping devices via a beverage connector and a tapping line, said beverage connector allowing a beverage to be dispensed from said one or more tapping devices when said one or more pressure chambers are pressurized, said cleaning unit comprising: a first inlet for receiving a pressure fluid, a second inlet for receiving a cleaning liquid, said cleaning liquid comprising water and an active cleaning agent, an outlet for supplying said cleaning liquid to said beverage connector of said beverage dispensing system, a guiding mechanism for steering the passage of said cleaning liquid from said second inlet to said outlet, using said pressure fluid received at said first inlet for propelling the cleaning liquid, and a user interface for controlling said guiding mechanism and/or said beverage connector, and characterised in that said beverage connector is a three-port discharge valve, said discharge valve having at least a beverage dispensing position, a cleaning position and a closed position, said beverage dispensing position allowing a beverage to be dispensed from said tapping device when said one or more pressure chambers are pressurized while preventing a cleaning liquid from being dispensed from said one or more tapping devices, said cleaning position allowing said cleaning liquid to be dispensed from said one or more tapping devices while preventing said beverage from being dispensed from said one or more tapping devices, and said closed position preventing any of said beverage and cleaning liquid being dispensed from said one or more tapping devices. a first inlet for receiving a pressure fluid, a second inlet for receiving a cleaning liquid, said cleaning liquid comprising water and an active cleaning agent, an outlet for supplying said cleaning liquid to said beverage connector of said beverage dispensing system, a guiding mechanism for steering the passage of said cleaning liquid from said second inlet to said outlet, using said pressure fluid received at said first inlet for propelling the cleaning liquid, and a user interface for controlling said guiding mechanism and/or said beverage connector, and characterised in that said beverage connector is a three-port discharge valve, said discharge valve having at least a beverage dispensing position, a cleaning position and a closed position, said beverage dispensing position allowing a beverage to be dispensed from said tapping device when said one or more pressure chambers are pressurized while preventing a cleaning liquid from being dispensed from said one or more tapping devices, said cleaning position allowing said cleaning liquid to be dispensed from said one or more tapping devices while preventing said beverage from being dispensed from said one or more tapping devices, and said closed position preventing any of said beverage and cleaning liquid being dispensed from said one or more tapping devices.