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, PE 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°C, so they are the ideal substitute of metal pipes.