ABS 1-1/2" Vent Tee. 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. The ABS 1-1/2" Vent Tee is designed for running a vent pipe for extra air in the piping systems for increased water flow.