A conduit arrangement of a fluid distributing device, the conduit arrangement comprises: - a source fluid conduit and an outlet, - a container fluid conduit for guiding a container fluid entering through a container fluid inlet to said outlet, - a source fluid inlet connected to said source fluid conduit for guiding a source fluid entering through the source fluid inlet to said outlet, - said container fluid inlet being connected to said container fluid conduit - a gas fluid inlet being in fluid connection with the container fluid conduit for guiding a gas fluid entering through the gas fluid inlet to an inlet of the container for releasing the container fluid into the container fluid conduit, - a plurality of valves including at least a valve associated with the source fluid conduit and a valve associated with the contained fluid conduit, each valve having a first and a second state and a controller configured to switch each of the valves (32, 34, 36) from the first state to the second state and vice versa for allowing or preventing, respectively, the container fluid or the source fluid to enter the corresponding conduit (43, 45), wherein the controller is configured a. to work in a normal use mode, in which the plurality of valves (32, 34, 36) is switched such that the fluid distributing device is usable for a normal use, wherein during normal use at least one conduit (43, 45) is for guiding a liquid flow to at least one hand piece, and at least one conduit (43, 45) is for guiding a second liquid flow and/or a powder flow to at least one hand piece or b. to work in a cleaning mode, in which the plurality of valves (32, 34, 36) is switched such that the fluid distributing device is usable in a cleaning mode for cleaning the conduits (43, 45) and wherein a container (20, 26), comprising a container fluid, is connectable to the container inlet and characterized in that by connecting the container (20, 26) to the container inlet, the valves (32, 34, 36) are automatically, switched to the first state for allowing a container fluid flow during the normal use into the container conduit. - a source fluid conduit and an outlet, - a container fluid conduit for guiding a container fluid entering through a container fluid inlet to said outlet, - a source fluid inlet connected to said source fluid conduit for guiding a source fluid entering through the source fluid inlet to said outlet, - said container fluid inlet being connected to said container fluid conduit - a gas fluid inlet being in fluid connection with the container fluid conduit for guiding a gas fluid entering through the gas fluid inlet to an inlet of the container for releasing the container fluid into the container fluid conduit, - a plurality of valves including at least a valve associated with the source fluid conduit and a valve associated with the contained fluid conduit, each valve having a first and a second state and a controller configured to switch each of the valves (32, 34, 36) from the first state to the second state and vice versa for allowing or preventing, respectively, the container fluid or the source fluid to enter the corresponding conduit (43, 45), wherein the controller is configured a. to work in a normal use mode, in which the plurality of valves (32, 34, 36) is switched such that the fluid distributing device is usable for a normal use, wherein during normal use at least one conduit (43, 45) is for guiding a liquid flow to at least one hand piece, and at least one conduit (43, 45) is for guiding a second liquid flow and/or a powder flow to at least one hand piece or b. to work in a cleaning mode, in which the plurality of valves (32, 34, 36) is switched such that the fluid distributing device is usable in a cleaning mode for cleaning the conduits (43, 45) and a. to work in a normal use mode, in which the plurality of valves (32, 34, 36) is switched such that the fluid distributing device is usable for a normal use, wherein during normal use at least one conduit (43, 45) is for guiding a liquid flow to at least one hand piece, and at least one conduit (43, 45) is for guiding a second liquid flow and/or a powder flow to at least one hand piece or b. to work in a cleaning mode, in which the plurality of valves (32, 34, 36) is switched such that the fluid distributing device is usable in a cleaning mode for cleaning the conduits (43, 45) and