The NIBCO 4 in. ABS DWV Hub x FIPT Female Adapter (Female NPT Thread) is used in non-pressurized Drain, Waste and Vent (DWV) systems, above-ground. Join this to male pipe threads using solvent. ABS DWV is joined by solvent cementing or threading and can easily be connected to steel, copper, or cast iron through the use of transition fittings. Color: Plastic.