PVC mute drainage/ Spiral vertical pipe check hole

PVC drainage pipe fittings produce based on polyvinyl chloride (PVC) resin as the main raw material, by adding suitable amount of the stabilizer, lubricant, filler, toner and injection molding after fully mixed, and then through multi-channel working procedures such as heating, extrusion, styling, cooling, stripping, trimming, inspection, packing and other processes to complete the production of pipe fittings.