Made from high-density polyethylene (HDPE), this special pipe features a smooth inner wall, corrugated outer wall, and a hollow space between the inner and outer walls. It is mainly used in underground sewage and drainage systems. The socket uses a double-walled structure, expanded online during production. The double-walled structure is relatively rigid, and uses natural rubber for flexible connection. It is easy to install, the connection is reliable, leakage is unlikely, the overall cost is low, and the lifespan is up to 50 years.

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