A galley unit for a means of transportation, comprising: a fluid line (3, 12), a water supply with a supply line and a first fluid branch, wherein the first fluid branch is designed for being coupled to a consumer, a control unit, and a draining device for draining the fluid line (3, 12) in the galley unit, the draining device comprising: a drainage line having a first end and a second end; a mechanically non-locking coupling, which produces a fluid-conductive connection with the fluid line (3, 12); a holding device that is designed for holding the mechanically non-locking coupling stationary relative to the fluid line; wherein the drainage line is sectionally made of a rigid material such that the holding device can exert a force upon the mechanically non-locking coupling via this section of the drainage line; wherein the fluid-conductive connection is realized by a double self-closing coupling; wherein the mechanically non-locking coupling comprises a self-closing coupling as one part of the double self-closing coupling, wherein the self-closing coupling is arranged at an end of the drainage line; wherein the holding device is coupled to the the drainage line; wherein the holding device comprises a locking element; wherein the locking element is designed for fixing the holding device in such a way that the holding device holds the mechanically non-locking coupling stationary relative to the fluid line (3, 12), wherein the drainage line is sectionally realized in the form of a flexible hose for bending the drainage line in accordance with respective spatial requirements in order to deliver a rinsing fluid being discharged to a sink, wherein the flexible hose comprises an outlet at the second end, wherein the mechanically non-locking coupling is coupled to the first fluid branch in a fluid-conductive manner such that a fluid can be discharged from the first fluid branch, and wherein the control unit is designed for transferring the first fluid branch into a fluid-conductive state. a fluid line (3, 12), a water supply with a supply line and a first fluid branch, wherein the first fluid branch is designed for being coupled to a consumer, a control unit, and a draining device for draining the fluid line (3, 12) in the galley unit, the draining device comprising: a drainage line having a first end and a second end; a mechanically non-locking coupling, which produces a fluid-conductive connection with the fluid line (3, 12); a holding device that is designed for holding the mechanically non-locking coupling stationary relative to the fluid line; wherein the drainage line is sectionally made of a rigid material such that the holding device can exert a force upon the mechanically non-locking coupling via this section of the drainage line; wherein the fluid-conductive connection is realized by a double self-closing coupling; wherein the mechanically non-locking coupling comprises a self-closing coupling as one part of the double self-closing coupling, wherein the self-closing coupling is arranged at an end of the drainage line; wherein the holding device is coupled to the the drainage line; wherein the holding device comprises a locking element; wherein the locking element is designed for fixing the holding device in such a way that the holding device holds the mechanically non-locking coupling stationary relative to the fluid line (3, 12), wherein the drainage line is sectionally realized in the form of a flexible hose for bending the drainage line in accordance with respective spatial requirements in order to deliver a rinsing fluid being discharged to a sink, wherein the flexible hose comprises an outlet at the second end, wherein the mechanically non-locking coupling is coupled to the first fluid branch in a fluid-conductive manner such that a fluid can be discharged from the first fluid branch, and wherein the control unit is designed for transferring the first fluid branch into a fluid-conductive state. a drainage line having a first end and a second end; a mechanically non-locking coupling, which produces a fluid-conductive connection with the fluid line (3, 12); a holding device that is designed for holding the mechanically non-locking coupling stationary relative to the fluid line; wherein the drainage line is sectionally made of a rigid material such that the holding device can exert a force upon the mechanically non-locking coupling via this section of the drainage line; wherein the fluid-conductive connection is realized by a double self-closing coupling; wherein the mechanically non-locking coupling comprises a self-closing coupling as one part of the double self-closing coupling, wherein the self-closing coupling is arranged at an end of the drainage line; wherein the holding device is coupled to the the drainage line; wherein the holding device comprises a locking element; wherein the locking element is designed for fixing the holding device in such a way that the holding device holds the mechanically non-locking coupling stationary relative to the fluid line (3, 12), wherein the drainage line is sectionally realized in the form of a flexible hose for bending the drainage line in accordance with respective spatial requirements in order to deliver a rinsing fluid being discharged to a sink, wherein the flexible hose comprises an outlet at the second end, wherein the mechanically non-locking coupling is coupled to the first fluid branch in a fluid-conductive manner such that a fluid can be discharged from the first fluid branch, and wherein the control unit is designed for transferring the first fluid branch into a fluid-conductive state.