The distribution system consists of over of pipe with diameters ranging from less than to in diameter. The majority of the total pipe length is sized in diameter. About 88 percent of the distribution system is pipes sized or smaller in diameter. The DWU distribution system is made of several different pipe materials. Small diameter pipe materials include copper, galvanized iron, PVC, and cast iron. Larger diameter transmission mains are made of steel and various reinforced and prestressed concrete. Approximately 51 percent of the distribution system