Abstract: An apparatus for installing a connection fitting into an aperture formed in a wall of a main pipeline in the making of a service connection between a side connection and the main pipeline includes propulsion means for propelling the apparatus along the main pipeline to a site at which the service connection is to be made, and installation means for installing, from within the main pipeline, at least a portion of the connection fitting into the aperture. The installation means may include a storage device for storing at least one connection fitting intended for installation, a conveyance device for conveying a connection fitting to be installed from the storage device to an installation location, and an insertion device for inserting the connection fitting conveyed to the installation pad or platform from the installation pad or platform into the aperture formed in the wall of the main pipeline.