Adopting extrusion technics, and the final products, which can endure pressure 0.4-2.5Mpa, are mainly used in the indoor water supply. Using hot melting for weld, antisepsis, and anticorrosive. And these kinds of pipes are the new water supplying products, which are environment protection. PP pipes are widely used in winter warm getting of the cold areas. and which will not transfigure and swell in the high temperature of 100℃, so they are the ideal substitute of metal pipes.