Spears 830-SR Series PVC Pipe Fitting, Coupling, Schedule 80, Gray, 1" Stainless Steel Reinforced NPT Female Coupling for connecting two pipes with the same diameter in a straight run Female NPT threads with stainless steel reinforcement on both ends for connecting pipes with male NPT threaded ends PVC body with a stainless steel reinforcement for strength and resistance to chemicals and corrosion 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