To overcome the disadvantages of traditional galvanized pipe, new types of water supply piping materials have been developed. Comparison and classification are made based on their characteristics such as thermal stability, resistance to pressure, expansion coefficient and thermal conductivity, resistance to water hammer, cost and easiness of installation. Furthermore, the characteristics were discussed according to their locations in buildings: distribution main line in each pressure zone, branch pipe in water closet and the main line. Finally, the conclusion about the principles for pipe selection according to its location in buildings is given.