Abstract: An adaptor for extending a pipe through a barrier and securing the pipe therein which comprises a pipe segment having a leading end for insertion through the barrier and a trailing end to remain at the insertion side of the barrier upon insertion of the adaptor, each end being adapted to receive a pipe fitting. The leading end is provided with peripheral cutting teeth for boring a hole through and thereby penetrating the barrier upon rotation of the pipe around its longitudinal axis. An externally threaded section along the pipe is sized and configured to be self-threaded though the hole bored by the penetration end to secure the pipe therein and a stop is located toward the trailing end from the threaded section to engaging the outer surface of the barrier to stop further penetration of the adaptor. An installation tool which may be rotationally driven by a hand drill is also provided.