PE-RT that is heat-resistant polyethylene .Polyethylene of raised temperature resistance is the abbreviation which is a non-cross linked polyethylene can be used for hot water pipes. It was also highlighted the characteristics of its non-cross linked, they called it "High temperature non-cross linked polyethylene. It adopts the unique molecular design and synthesis technology, the medium-density polyethylene, which uses ethylene and octene copolymer method to obtain unique molecular structure by controlling the number and distribution of the side chains to improve PE resistance heat. Due to the presence of octene short branched ,PE macromolecules can not make a flaky crystals crystal, but throughout several crystals, forming a link between the crystals and it retains the PE of good flexibility, high thermal conductivity and inertness, while the pressure is better. This modified method is similar and common on the market today PPR. PE-RT pipe can be used for all levels of the ISO10508 specified hot water pipes!