Multi-layer pipe production line can produce 5 layer co-extruding pipes. The pipe is mainly made of PE-RT, it is mainly used indoor particular for cold and hot water supply. It has all the advantage of HDPE and PP-R pipes, when using at central heating, it performs better than all other pipes. Its EVOH layer can stop Oxygen go into the pipe, protecting central heating system been oxidation and safer. It is also the best choice for floor heating.