PVC pipe fittings are various fittings and related parts that can be used for PVC pipes. PVC is a material with excellent resistance to chemicals and corrosion, it weighs 1/2 that of aluminum, it is lightweight and is an insulator, therefore it is used in a wide variety of areas, such as various facilities for chemicals, steelmaking, nonferrous metal fields, power plants, etc. Usable substances are gas, chemical and oil, in addition to water and air. In addition, various selections can be made according to the application such as connecting same or different diameter pipes, etc. For PVC pipe fittings, there is a multi-type product that can be used for steel pipes and polyethylene pipes in addition to PVC pipes. Related parts include flanges and caps used for cleaning and maintenance, joints for connecting lead pipes, packing, etc. There are two types of caps, adhesive types and screw types.