An inner mounting (5) carries the end of the roller set shaft.

The inner coupler may be inserted into the pipe and bonded to the pipe.

The bonding may include electrofusion, adhesives, heating, and clamping of the inner coupler to the pipe.

A process for joining thin, walled non-metallic pipe using a tubular inner coupler.

The inner coupler may include a shoulder to farm an attachment point for clamping inner coupled pipe joints together.

The fitting has a hollow fitting passage therethrough in fluid communication with the interior tube passage when the fitting is adjoining the hollow tube.

An inner mounting (5) carries the end of the roller set shaft.

The outer ring (42) inside diameter is greater than the inner diameter of the flange junction to permit the inner ring (40) to be compressed upon forming the junction.

The gripping piece (5) has the internal taper (7) of a Luer connection, wherein the internal taper (7) of the Luer connection has a fluid connection to the tubular swab rod (3).

The fitting comprises inner (10) and outer (20) coaxial tubular elements.

The 'L' fitting contains a single passageway which terminates at an internal bore circumscribed by an annular flange.

A second fitting may be a similar 'T' fitting or an 'L' fitting.

The inner coupler may be inserted into the pipe and bonded to the pipe.

The connector is pressed against an internal cone of a receiving connector by a coupling nut by means of a clamping cone.

The fitting assembly includes a first fitting defining a central passage adapted to receive a first fluid conduit defining an internal diameter of no greater than 1.0160 mm (0.040 inch) and a second fitting.