Drain, waste and vent fittings made of polyvinyl chloride (PVC). PVC-DWV fittings are used for residential and commercial sanitary systems. PVC is one of the thermoplastic materials most frequently specified for a variety of products used in the pipe and fittings industry. Due to its excellent rigidity, corrosion and chemical resistance properties, it is also used in many chemical related areas. Color: White PVC.