Device for connecting a water pipe to a component having a passage

A device for connecting a water pipe to a component having a passage, the device comprising:

• a connecting piece having a passage channel for the passage of water in the direction of the component,
• wherein the connecting piece has a first end to be connected to the component, a second end to be connected to the water pipe and an outwardly projecting stop in the form of a collar or flange formed between the first end and the second end,
• wherein the first end of the connecting piece is provided on its outer side with an annular groove or is formed as a socket for receiving a sealing ring,
• wherein a sealing ring is arranged in the annular groove or on the socket, and
• a fastening element for fastening the connecting piece to the component, at least one projection engaging behind the stop being formed on the fastening element,
• the stop defining a stop surface which, when the connecting piece is fastened to the component, interacts with a seating surface of the component by defining a position of the connecting piece relative to the component,
• wherein the stop has at least one recess, by means of which an annularly closed surface contact between the stop surface of the stop and the seating surface of the component is interrupted or prevented, the at least one recess being formed in the form of a gap which extends from an outer edge of the stop to a circumferential outer surface of the first end of the connecting piece or ends at a radial distance from this outer surface, wherein the gap extends over the entire axial thickness of the stop.