An apparatus for dispensing liquid comprising: a base structure having a liquid inlet configured to receive a liquid from a liquid source, a gas inlet configured to receive gas from a gas source, a dispensing outlet connected to a liquid dispensing unit, a storage connecting portion connected to a liquid storage, and a passage arrangement configured to put at least two of the liquid inlet, the gas inlet, the dispensing outlet and the storage connecting portion into fluid communication with each other. The apparatus further comprises a valve arrangement seated in the base structure and configured to control fluid passage of the liquid inlet, the gas inlet, the dispensing outlet, and/or the storage connecting portion. The apparatus further comprises a control unit having at least one signal input configured to be connected to a user interface, and at least one signal output configured to control the valve arrangement.