With the NIBCO 4 in. ABS DWV 90-Degree Hub x Hub Street Elbow, you can complete the installation of your DWV system to help remove wastewater from plumbing fixtures. The fitting features an ABS construction and can redirect ABS piping 90 degrees. ABS DWV is joined by solvent cementing or threading and can easily be connected to steel, copper, or cast iron through the use of transition fittings. Color: Black ABS.