GF Piping Systems PVC Pipe Fitting, Flange, Schedule 80, Gray, 3/4" Slip Socket Flange for joining pipes or connecting valves in a piping system Socket opening for connecting to a male pipe or fitting PVC for chemical and corrosion resistance, high strength, and less weight than fittings made from metal Operating temperature range of 0 to 60 degrees C (32 to 140 degrees F) Meets ASTM D1784 and D1785 standards for quality assurance, and meets NSF standards 14 for plastic piping and 61 for potable water service