Abstract: An underground pipe repair system is for a branch pipe connecting with a service pipe. The underground pipe repair system includes a robot device with an inflation tool, a processor, and a housing carrying the inflation tool and the processor. The underground pipe repair system also includes a liner assembly having an inverted liner including a proximal end coupled to the inflation tool, and a distal end opposite the proximal end, and an electronic curing device coupled to the distal end and within the inverted liner. The processor is configured to cause the robot device to move through the service pipe, determine a position of the branch pipe, operate the inflation tool to invert and cause the inverted liner to inflate within the branch pipe and position the electronic curing device within the inflated liner, and activate the electronic curing device to cure the inflated liner within the branch pipe.

Abstract: An underground pipe repair device is for a joint between a service pipe and a branch pipe. The underground pipe repair device may include a T-shaped joint liner having a base portion extending laterally in the service pipe, and an arm portion extending vertically into the branch pipe, the base portion including a first base surface facing the service pipe, and a second base surface opposite the first base surface. The underground pipe repair device may include an annular body aligned with an opening for the branch pipe and coupled to the second base surface of the T-shaped joint liner. The annular body may have a physical characteristic to be detected by a robot device within the service pipe.

Abstract: An underground pipe repair device is for a joint between a service pipe and a branch pipe. The underground pipe repair device may include a first T-shaped joint liner having a base portion extending laterally in the service pipe, and an arm portion extending vertically into the branch pipe. The underground pipe repair device may also include an annular body aligned with and being radially spaced from an opening for the branch pipe and coupled to the first T-shaped joint liner for enabling reinstatement of the branch pipe opening without damaging a liner in the service pipe or the first T-shaped joint liner.