Inter Stack Coupling Pipes are provided to couple the two columns on the same phase of the disconnector so as to ensure simultaneous rotation of the two poles columns driven by the common operating mechanism. The Coupling Pipes are linked to the base flange on which the insulator is mounted by metallic pin to ensure easy assembly or dismantling at site. The Coupling Pipes provide optimum performance for applications in the various sectors that are assembled on to the base and set at factory. Inter Stack Coupling Pipes are available in different specifications to suit the specific requirements.