Naco PVC 2857-6661 12"x6" Glue Wye. Naco is the industries leader in manufacturing PVC pipe, fittings and valves. PVC Pipe is designed for both above and below ground DWV (Drain, Waste, Vent) Applications. Pvc is generally used for both commercial and residential plumbing construction. Naco covers your PVC needs in every industry from agriculture to drainage systems. This Naco PVC 2857-6661 12"x6" Glue Wye is similar to a tee, the branch allows a side outlet to run smaller fixtures and lines. The smaller line that connects tot he larger line increases flow and the removal of waste.