Spears 429 Series PVC Pipe Fitting, Coupling, Schedule 40, White, 1/2" Socket Coupling for connecting two pipes with the same diameter in a straight run Socket openings on both ends for connecting two male pipes PVC for chemical and corrosion resistance, high strength, and less weight than fittings made from metal Maximum operating temperature of 140 degrees F Meets ASTM D1784 and D2466 standards for quality assurance, and certified by NSF International for potable water service