Properties 1.Environmental-friendly, no toxin, resistant to corrosion; 2.Endurable high temperature(the highest temperature is 95 centigrade) and high pressure(anti-pressure test intension over 5 MPa); 3.Heat-Melting joining, no leakage; 4.Light weight (only 1/8 of metal pipe); Lower thermal conduction expansion (only 1/20 of metal pipe); 5. Beautiful appearance, both shown fitment and hidden fitment; 6. Good anti-corrosive, lower cost; 7. Long service life, over 50 years under allowable condition. Application areas 1. Cold- hot water supply system for Civil using and construction engineering; Public sites and games sites; 2. Drinking water system and food processing pipe system; 3.Irrigation system for Park and hothouse; 4.Traditional heat supply system; 5.Center air-conditions system. Package: plastic film for outside