ABS 2" Threaded Coupling. ABS Pipe is a light weight and quiet DWV (Drain, Waste, Vent) Pipe. ABS Pipe is generally used in residential applications like: Bathroom fixtures, kitchen appliances, and ventilation systems. ABS is versatile and recommended for use as a water systems only. ABS Pipe and Fittings, like PVC, are to be glued together for a more reliable seal. This ABS 2" Threaded Coupling features 2" female threads and 2" slip-fit connections. This connection is ideal for appliances and drains with threads. You can easily connect the line to the pipe and thread the other part of the coupling.