1. Long service life.nPVC-U pipe is a thermoplastic product with stable chemical properties, strong corrosion resistance, aging resistance and wear resistance. The drainage pipe can be used normally for 50 years.n2. Good drainage performance.nThe fluid resistance of PVC-U drainage pipe is small, and the flow rate is increased by 30% compared with that of cast iron pipe of the same diameter.n3. Light and durable, easy to install.nAs the drainage pipe is installed with hemp, interface material, dam mouth and maintenance, the construction process is heavy and takes a long time. The PVC-U drainage pipe is light and adopts socket type adhesive interface, which greatly reduces the work task and saves time and labor.n4. Affordable and beautiful.nThe market price of PVC-U drainage pipe is 20% cheaper than that of cast iron drainage pipe, which greatly reduces the construction cost and the transportation cost. The white outer wall does not need anti-corrosion treatment, which saves maintenance and care costs and is easy to clean.