Spears 429-B Series PVC Pipe Fitting, Coupling, Schedule 40, Black, 2" Socket Coupling for connecting and extending two pipes with the same diameter in a straight run Socket ends for connecting to unthreaded 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 NSF/ANSI 61 Annex G, NSF/ANSI 372 for quality assurance