Qufu, Shandong, China is the hometown of Confucius, with a long history and culture, and the urban reconstruction faces many difficulties. The Qufu City Rainwater and Sewage Separation Project uses DHPI's rainwater and sewage separation special pipes  PVC-UH low-pressure sewage and drainage pipes, with a total length of 5.3 kilometers. After the project is completed, it will effectively solve the rainwater and sewage separation problem in Qufu City communities.
PVC-UH pipes are new products that have been improved by the R&D team in terms of formula and structural layout. They have excellent toughness and ring stiffness. At the same time, they are quick to install and have a small excavation area, which greatly improves construction efficiency and reduces the pressure on urban traffic caused by construction. It is very suitable for outdoor burial and pipe gallery internal frame and other laying methods.