... 5.black, 4m 0r 6m Product Description:HDPE Pipe for Water Supply: PE100 1. Certificate: GB\T13663-2000 2. Complete specification ... joint Certificate: ISO, GB/T Application: Water supply, sewage treatment, building materials, industrial liquids transportation , projects and agricultural irrigation, etc. Advantages: 1. nontoxic ... be partners in the near future. HDPE Pipe for Water Supply and Drainage