Spears 436-G Series PVC Pipe Fitting, Adapter, Schedule 40, Gray, 1/2" NPT Male x 3/4" Socket Reducing adapter for connecting pipes or fittings of different diameters and end types Male NPT threads on one end and socket connection on the other for connecting two pipes with different ends 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