This PVC cleanout adapter features a spigot x cleanout connection with a threaded cap to provide for a means of clearing potential clogs. Polyvinyl chloride (PVC) is the most frequently specified of all thermoplastic materials because of its light weight, durability, and cost-effectiveness. PVC DWV (Drain-Waste-Vent) is easy to install and is joined by solvent cementing. PVC fittings exhibit high corrosion and chemical resistance and will not rust, scale, pit or corrode.