NIBCO 4801-2-F Series PVC DWV Pipe Fitting, Bushing, 2" Spigot x 1 1/2" Hub Bushing for connecting two pipes with different diameters Spigot on one end and hub opening on the other for connecting two pipes with different ends PVC-DWV for corrosion resistance, high strength, and less weight than fittings made from metal Smooth interior finish for reduced friction and material buildup Meets specifications ASTM D2665 and D3311 for quality assurance