The NIBCO 2 in. x 2 in. x 1-1/2 in. x 1-1/2 in. ABS DWV Double Sanitary Tee can be used to bring two ABS DWV branch lines into one vertical drain line. PVC fittings exhibit high corrosion and chemical resistance and will not rust, scale, pit or corrode. Polyvinyl chloride (PVC) is the most frequently specified of all thermoplastic materials because of its light weight, durability, and cost-effectiveness. Color: Black.