GF Piping Systems CPVC Pipe Fitting, Plug, Schedule 80, Gray, 1" NPT Male Plug for closing the end of a pipe or fitting Male NPT threads for connecting to female NPT threaded pipes CPVC for chemical and corrosion resistance, high strength, and better resistance to high temperatures and pressures than PVC Operating temperature range of 0 to 93 degrees C (32 to 200 degrees F) Meets ASTM D1784 and F441 standards for quality assurance, and meets NSF standards 14 and 61 for potable water service