Connecting mechanism for forming a water-tight, dismantleable connection of two pipe-shaped components, through which liquid can flow, wherein the connecting mechanism comprises a first connecting element which is equipped with a receiving space, a second connecting element for engaging in the receiving space of the first connecting element, an elastic seal and a wedge connecting element with an oblique wall and a straight wall, wherein the first connecting element is equipped on a circular-shaped outlet with a radially protruding circular-shaped edge with an adjoining axial extension of substantially semicircular-shaped cross-section, the base of which with the base length (d) is limited by an end edge with U-shaped cross-section and at the end edge is arranged an oblique wall towards the outlet, wherein the second connecting element is equipped on its circular-shaped outlet with a circular-shaped flange protruding radially to the outside having a wall, and its flange thickness (h) is less than the base length (d) of the base of the extension, the flange is equipped with the elastic seal and wherein the oblique wall of the wedge connecting element is angled at an angle which corresponds to the angle of inclination of the oblique wall arranged at the end edge, characterised in that the connecting mechanism is formed such that in the case of the assembly after a connection, which is initially not water-tight, of the first connecting element with the second connecting element, the wedge connecting element can be set into the space defined by the oblique wall of the end edge and the wall of the flange arranged on the second connecting element such that a sealing of the connection is achieved, in that the wedge connecting element is pushed with its wall along the oblique wall arranged on the end edge and during the pushing movement of the wedge connecting element in transverse direction the straight wall is pressed in axial direction against the wall of the flange such that the second connecting element is pressed against the first connecting element in axial direction and at the same time the elastic seal comes without deformation friction into close contact with the outlets (16, 23) of the first and second connecting element (10, 20). wherein the connecting mechanism comprises a first connecting element which is equipped with a receiving space, a second connecting element for engaging in the receiving space of the first connecting element, an elastic seal and a wedge connecting element with an oblique wall and a straight wall, wherein the first connecting element is equipped on a circular-shaped outlet with a radially protruding circular-shaped edge with an adjoining axial extension of substantially semicircular-shaped cross-section, the base of which with the base length (d) is limited by an end edge with U-shaped cross-section and at the end edge is arranged an oblique wall towards the outlet, wherein the second connecting element is equipped on its circular-shaped outlet with a circular-shaped flange protruding radially to the outside having a wall, and its flange thickness (h) is less than the base length (d) of the base of the extension, the flange is equipped with the elastic seal and wherein the oblique wall of the wedge connecting element is angled at an angle which corresponds to the angle of inclination of the oblique wall arranged at the end edge, characterised in that the connecting mechanism is formed such that in the case of the assembly after a connection, which is initially not water-tight, of the first connecting element with the second connecting element, the wedge connecting element can be set into the space defined by the oblique wall of the end edge and the wall of the flange arranged on the second connecting element such that a sealing of the connection is achieved, in that the wedge connecting element is pushed with its wall along the oblique wall arranged on the end edge and during the pushing movement of the wedge connecting element in transverse direction the straight wall is pressed in axial direction against the wall of the flange such that the second connecting element is pressed against the first connecting element in axial direction and at the same time the elastic seal comes without deformation friction into close contact with the outlets (16, 23) of the first and second connecting element (10, 20).