PVC barbed tube fittings are suitable for use with cold water supply and drainage applications. Polyvinyl chloride, or 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. These barbed fittings include ridges on the exterior surface that grip inside the tubing for a tight seal without glues or bonding agents. Hose clamps provide additional holding power.