Gas Type- 2 Positions, LPG 10" W. C & NG 4" W. C, Max inlet pressure PSI: 1/2 (3.5KPa), Gas Flow: 120,000BTU/ Hr. Adjustable outlet pressure 4" &10" Water Column. Fitting- in 1/2" x out 1/2" NPT Pipe threads. When apply to LP gas, it needs to work with an external regulator (NOT supplied). Install the external regulator between the propane supply source and Maxitrol regulator. Safety - Our Pressure Regulators Pass CSA certificate for your safety. no gas leaks, ensures safety while using grill, air flow is kept stable and at appropriate levels. Applications- Stable Gas flow, for Natural LP Gas grills, heater, oven, Gas Welding Equipment, NG gas pressure regulator Default Setting - NG Gas. Please take the Hex Screw out to reverse the plastic screw if you want to use for LG Gas. Do not install the regulator too close to the heating equipment or use in very cold environment. Heat or cold can change the resistance of the spring inside the regulator.