1/4", 3/8", 1/2" NPT threaded connections
0.12", 0.22" and 0.36"
15C Series Check Valves: 0 °F (-17.8 °C) to 400 °F (204 °C)
15CO Series Check Valves: -110 °F (-79 °C) to 1200 °F (649 °C)