Abstract: A liner for a closed carrier such as a sewer is pulled into place in a branch line by a cable which extends through the branch line into a main line and along the main line to an access point remote from the connection between branch and main. The branch-to-main connection is inaccessible to workers because of the small diameter of the carriers. The liner is pulled up to this connection by the cable and then cured in place thereafter the cable is removed and the liner trimmed as required. A robotic device having a cornering device mounted on it may be positioned in the main at the connection to facilitate movement of the cable around the corner from the lateral into the main.