The NIBCO 1-1/2 in. PVC DWV cleanout adapter features a spigot x cleanout connection with a plug 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 is easy to install and is joined by solvent cementing or threading. PVC fittings exhibit high corrosion and chemical resistance and will not rust, scale, pit or corrode.