Abstract: A plug-in coupling for a pipe, especially for water conduits, includes a coupling sleeve receiving the pipe end, includes a sealing ring which is inserted into the coupling sleeve, and includes a locking ring which is mounted upstream of the sealing ring in the plug-in direction of the pipe end and forms retaining claws which protrude with respect to the pipe end and are inclined in the plug-in direction. The plug-in coupling also includes an annular body which is similarly mounted upstream of the sealing ring and is supported axially in the plug-in direction in relation to the coupling sleeve. The annular body includes a protective ring for surrounding the face end of the pipe end from the outside, which protective ring is connected via a predetermined breaking connection.

Abstract: The invention relates to a plug-in coupling for a pipe (3), especially for water conduits, comprising a coupling sleeve (1) receiving the pipe end (2), a sealing ring (4) which is inserted into the coupling sleeve (1), a locking ring (6) which is mounted upstream of the sealing ring (4) in the plug-in direction of the pipe end (2) and forms retaining claws (7) which protrude with respect to the pipe end (2) and are inclined in the plug-in direction, and an annular body which is similarly mounted upstream of the sealing ring (4) and is supported axially in the plug-in direction in relation to the coupling sleeve (1). In order to provide advantageous constructional conditions it is proposed that the annular body comprises a protective ring (12) for surrounding the face end of the pipe end (2) from the outside, which protective ring is connected via a predetermined breaking connection (13).