NIBCO 4551-H Series PVC Pipe Fitting, Flange, Schedule 80, 1-1/4" Socket Flange for joining two pipes or connecting valves in a piping system Socket ends for connecting to male pipes or fittings PVC 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 D1784 Class 12454-B for quality assurance