NIBCO 4807 Series PVC DWV Pipe Fitting, 90 Degree Elbow, 4" Hub 90-degree elbow for connecting two pipes or fittings at an angle Hub ends for connecting to male unthreaded pipes or fittings 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