Abstract: A system and method for electrically isolating conduit connections in a gas line system for residential, commercial or industrial applications. Gas line conduit of standard configuration is cut to length and upset at one end to create an annular flange of increased diameter, which then is machined to a desired configuration having annular ridges and flat and tapered surfaces. The other end of the conduit is machined in a standard thread configuration. The flanged portion of the conduit is then placed in an injection molding machine and receives a non-conductive elastomeric, molded seal thereover which includes a tubular pilot portion. A coupling nut slipped over the conduit may then join the conduit to conventional gas line valves, meters or the like in a completely electrically insulated connection.