Abstract: A connector unit includes a base body with a mount for a pipe, at least one holding element which enters into holding engagement with a circumferential recess of the pipe, and a control sleeve displaceable relative to the base body, wherein the control sleeve is displaceable between a first and a second axial positions, wherein the holding element in the first axial position is in holding engagement with the pipe, which can be released in the second axial position. The control sleeve in the first axial position can be displaced in a circumferential direction between a first and a second rotational positions, wherein the control sleeve in its first rotational position can be displaced into the second axial position, whereas in the second rotational position it is held by the base body in an interlocking manner in the first axial position.