Spears 836 Series PVC Pipe Fitting, Adapter, Schedule 80, 1" Socket x NPT Male Adapter for connecting pipes or fittings of different types Socket opening on one end and male NPT threads on the other for connecting two pipes with different ends 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 D2467 standards for quality assurance, and certified by NSF International for potable water service