Use the NIBCO 1-1/2 in. ABS DWV 90° Hub x Hub Vent Elbow with non-pressurized drain, waste and vent systems to help remove wastewater from plumbing fixtures. The fitting features an ABS construction. The ABS DWV 90° vent elbow features a hub x hub connection and the abrupt 90° angle is used to change the direction of flow in the venting side of the system. Acrylonitrile-Butadiene-Styrene (ABS) is resistant to a wide variety of materials ranging from sewage to commercial household chemical formulations and can be exposed to a wide temperature span. Color: Black.