Spears 898 Series PVC Pipe Fitting, Union with EPDM O-Ring, Schedule 80, 1" NPT Female Union fitting for connecting and disconnecting two pipes more easily than with couplings Female NPT threads on both ends for connecting pipes with male NPT threaded ends PVC for strength and resistance to chemicals and corrosion, and an EPDM seal for resistance to oil, water, and some solvents 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