Spears 430-G Series PVC Pipe Fitting, Coupling, Schedule 40, Gray, 1/2" NPT Female Coupling for connecting two pipes with the same diameter in a straight run Female NPT threads for connecting to male threaded pipes 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