In recent years, with the rapid development of China's economy, plastic pipes have been widely used. They are mainly used for urban water supply, drainage, building water supply and drainage. Rigid polyvinyl chloride water supply pipe has the characteristics of light weight, high density, good compressive strength, low price, high investment efficiency, energy saving and environmental protection, long service life, good sanitary conditions and convenient installation. However, there are many brands of pipelines with uneven quality. Some pipes marked "good grade" on the surface are actually slightly pulled and ruptured when struck, resulting in low tensile strength. This is conducive to the survival of the fittest in the PVC-U pipe industry. In the following article, we briefly introduce the functions and advantages of PVC pipe coupling, hoping to let you know more about the pipe of this material.