Polyvinyl chloride, or PVC, pipe and pipe fittings connect to transport potable water, corrosive liquids, and sewage in industrial and commercial applications. PVC, is a strong thermoplastic that resists ultraviolet (UV), acids, alkalis, oils, and many corrosive inorganic chemicals, making it resistant to the corrosive effects of sewage. Lightweight PVC is nonflammable with good electrical insulation properties, and its smooth interior walls resist scaling. PVC pipe and fittings come in a variety of shapes and sizes.