Water supply and drainage design, drainage, cast iron pipes and plastic pipes how to connect ah?
Cast iron drainage tube in China by hand foundry, backward production technology. With the exposure of quality defects of cast iron pipe and foundry manual, alternative PVC appearance, lightweight plastic pipe cast iron pipe into the market, market has slipped. Small pipes can be made of screws, big ones with flanges.
Cast iron drainage pipe as a real industry, is the reform and opening up only after the rise. At that time, China's infrastructure construction is vigorous and vigorous, and the urban appearance is changing with each passing day. The drainage pipe material is used in large quantities.
