1.HDPE pex pipe 2.anti-ultraviolet rays. 3.PN16 pressure resistance 4.long life service 5.Good ... , carton black and oxidation inhibitor, has the excellent capacity of ultraviolet radiation resistance, compared with current common metal pipes, it is ... 50 years 4. Never rusting 5. Anti-corrosion 6. Anti-ultraviolet & Oxygen barrier 7. Anti-aging, innocuity sanitation 8. Environmental Performance9 ...