Pipe Size 1/2" NPT Maximum Inlet Pressure 1/2 psi Output Pressure 4" W.C Natural ; 10 W.C LP Gas Pressure Drop @ 0.3” w.c. or (0.07 kPa) 60,000 (1.7) Emergency Exposure Limits 2.5 psi (17.2 kPa) Ambient Temperature Ranges 32° to 225°F (0° to 107°C) Housing Material Aluminum Approval ANSI, CSA