Ensure a smooth, leak-free propane connection with the Flame King 2-Stage Propane Gas RV Regulator with POL connection. Great for larger RVs, Food Trucks, Campervans and other large vehicles with appliances that require high BTU outputs. This 2-Stage Regulator is critically important for heavy-duty propane use. The 2-Stage Propane Gas RV Regulator allows you to control your propane to match the pressure required for specific propane devices. Dealing with the pressure released from the first stage, the second stage regulator will further control the pressure to safely meet the propane pressure/supply needed for the propane appliance in use. Made from heavy-duty aluminum and solid brass material ensuring the connections with the tank are secure and leak-free. POL Inlet tank connection is 1/4" female 18NPT and the outlet connection to the main RV gas line is 3/8"-18NPT. OUTLET PRESSURE: 11-inch WATER COLUMN pressure and a BTU/HR capacity of 300,000