A liquid distribution unit, for use in a liquid distribution system designed for saving liquid and thermal energy and having a number of feeding conduits connected to a central liquid source and being connectable at their far ends with associated liquid tap units, the liquid distribution unit comprising: - an inlet manifold device with a number of branch connections (C1, C2) for connection, in use, with each one of said feeding conduits (FC1, FC2) and liquid distribution system, - said inlet manifold device having an inlet end for joint connection, in use, with said central liquid source of said liquid distribution system, - a number of pipe connections extending from each of said branch connections of said inlet manifold device via an associated control valve (CV1, CV2) to an associated connection, in use, to one of said feeding conduits (FC1, FC2), - a single evacuation liquid pump being adapted to reduce the pressure in the associated feeding conduits and being connected, in use, to said central liquid source for recirculating liquid from the particular feeding conduits (FC1, FC2) to said central liquid source when evacuating the liquid in said feeding conduits, characterized in that - each of said branch connections (C1, C2) has an associated control valve (CV1, CV2) for enabling selective communication, in use, between said liquid source and a desired number of said feeding conduits (FC1, FC2), and a corresponding number of said feeding pipe connections extending from each of said branch connections (C1, C2) via said associated control valve (CV1, CV2) to an associated one of said feeding conduits (FC1, FC2), - there being an additional branch connection (AC1, AC2) located in each of said feeding pipe connections downstream of said associated control valve (CV1, CV2), as seen from said inlet manifold device, between said control valve (CV1, CV2) and the associated connection to said associated one of said feeding conduits, - each said additional branch connection (AC1, AC2) is permanently connected to said associated control valve (CV1, CV2), having an associated, separate evacuation valve (EV1, EV2) and a branch outlet (OE1, OE2), - the branch outlets (OE1, OE2) of said additional branch pipe connections (AC1, AC2) being jointly connected to an outlet manifold device, - said outlet manifold device having a single outlet end being connected to said single evacuation liquid pump, and - said single evacuation liquid pump, being adapted to reduce the pressure in any associated feeding conduit, which is connected via said associated evacuation valve (EV1, EV2) and said additional branch pipe connection (AC1, AC2), down to a lowermost pressure level of 20-80% of the ambient air pressure. - an inlet manifold device with a number of branch connections (C1, C2) for connection, in use, with each one of said feeding conduits (FC1, FC2) and liquid distribution system, - said inlet manifold device having an inlet end for joint connection, in use, with said central liquid source of said liquid distribution system, - a number of pipe connections extending from each of said branch connections of said inlet manifold device via an associated control valve (CV1, CV2) to an associated connection, in use, to one of said feeding conduits (FC1, FC2), - a single evacuation liquid pump being adapted to reduce the pressure in the associated feeding conduits and being connected, in use, to said central liquid source for recirculating liquid from the particular feeding conduits (FC1, FC2) to said central liquid source when evacuating the liquid in said feeding conduits, characterized in that - each of said branch connections (C1, C2) has an associated control valve (CV1, CV2) for enabling selective communication, in use, between said liquid source and a desired number of said feeding conduits (FC1, FC2), and a corresponding number of said feeding pipe connections extending from each of said branch connections (C1, C2) via said associated control valve (CV1, CV2) to an associated one of said feeding conduits (FC1, FC2), - there being an additional branch connection (AC1, AC2) located in each of said feeding pipe connections downstream of said associated control valve (CV1, CV2), as seen from said inlet manifold device, between said control valve (CV1, CV2) and the associated connection to said associated one of said feeding conduits, - each said additional branch connection (AC1, AC2) is permanently connected to said associated control valve (CV1, CV2), having an associated, separate evacuation valve (EV1, EV2) and a branch outlet (OE1, OE2), - the branch outlets (OE1, OE2) of said additional branch pipe connections (AC1, AC2) being jointly connected to an outlet manifold device, - said outlet manifold device having a single outlet end being connected to said single evacuation liquid pump, and - said single evacuation liquid pump, being adapted to reduce the pressure in any associated feeding conduit, which is connected via said associated evacuation valve (EV1, EV2) and said additional branch pipe connection (AC1, AC2), down to a lowermost pressure level of 20-80% of the ambient air pressure.