PVC drain pipe sanitary grade PVC resin is the main raw material, adding appropriate stabilizer, lubricant, filler, carbon powder and other plastic extruder extrusion and injection molding machine, through cooling, curing, formation, inspection, packaging and other procedures to complete the production of pipes and fittings. PVC drainage pipe has high safety factor, low friction coefficient, smooth flow, not easy to plug, less protection work, good water tightness, good aging resistance, normal service life of more than 50 years, excellent corrosion resistance to inorganic acid, alkali and salt.