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. Used in residential and commercial drain, waste and vent systems. 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.