Conductive polyvinyl chloride (CPVC) pipe is an electrical piping system. It is made of a polyvinyl chloride (PVC) plastic with a conductive additive, copper, silver, or zinc. The plastic is heated and extruded through a die to create the pipe. Conductive piping has advantages over PVC piping. It is flexible and allows for expansion and contraction without cracking. Conductive piping is also used in other areas, such as fire sprinklers.