It is new green environmental protection building materials that PPR aluminium moulds pipes. Unless it have it it compound five layers it form, wall aluminum pipes thin in intermediate layer,inside and outside layer for PPR. Through pressing the new pipe of complex pushed out of shaping at high temperature. It, metal and silent stock tube advantage overcome PPR, PE, PEX,etc. and is heated and swollen the fatal shortcoming out of shape all over, especially suitable for the conveyer system of hot water. His pipe and pipe fittings adopt hotly and melt joining, never seepage, will get warm, the top-grade villa, the skyscraper, solar energy, chemical industry, pharmacy, the ideals of environmental protection and civil building are managed.