Abstract: A pipe fitting for interconnecting concentric pipes together to a gas meter unit includes a standard insulated O-ring union internally modified so as to include therein a substantially frusto-conical recess for mating engagement with a correspondingly shaped neoprene compression seal. The neoprene compression seal is disposed radially inwardly from the O-ring. A steel tube is swaged to a plastic gas conduit pipe and includes a flat washer welded to an upper portion thereof to resist pull out of the steel tube from the pipe fitting assembly.