Flame King 300,000 BTU Horizontal 2-Stage Propane Regulator, POL Inlet, 11-inch WC Output

The Flame King 300,000 BTU horizontal 2-stage propane regulator is a heavy-duty POL-inlet regulator that delivers steady 11-inch WC outlet pressure to support large RVs, food trucks, generators and other high-BTU appliances.

Designed for applications that demand reliable high-flow propane delivery, this Flame King regulator combines a dual-stage pressure reduction system with robust aluminum and brass construction. It connects to standard POL tank fittings and outputs through a 3/8"-18NPT port, providing a consistent, safer gas supply for multi-appliance setups while resisting wear and leaks in mobile or stationary installations.

How does the two-stage design improve propane delivery?

The two-stage arrangement splits pressure reduction between an initial drop at the inlet and a finishing stage at the outlet. That staged approach reduces output fluctuation caused by changing tank pressure or varying appliance demand, so burners and heaters run with fewer interruptions.

• Smoother gas flow under shifting loads
• Less chance of regulator lock-up from rapid pressure swings
• Consistent 11-inch water column outlet suited for multiple appliances

What materials and connections ensure leak-free operation?

Flame King uses cast aluminum for the body and solid brass for critical fittings to resist corrosion and maintain durable seals. The regulator features a POL inlet for direct attachment to many 100 lb and ASME tanks and a 3/8"-18NPT outlet for secure connection to RV or equipment gas lines.

• Heavy-duty aluminum housing for long life and light weight
• Solid brass inlet components for tight, reliable threads
• Standard POL inlet and 3/8"-18NPT outlet compatibility

Can this regulator handle high-BTU appliances and multiple outlets?

Yes — rated at 300,000 BTU/hr with an 11-inch water column outlet, this regulator supports the combined demand of several high-output appliances commonly found on large RVs, food trucks, or generator systems. It includes a top vent and builds in safety features suited to heavy-use environments.

• 300,000 BTU/hour capacity for multi-appliance setups
• Vent hole positioned at top for proper venting orientation
• Ideal for ovens, furnaces, water heaters, and commercial burners

How do I install and maintain the regulator safely?

Mount horizontally in the intended orientation, secure the POL inlet to the tank with proper thread sealant or tape designed for propane, and use rated fittings on the 3/8"-18NPT outlet to the appliance line. Inspect connections for leaks after installation and schedule routine checks to confirm seals and venting remain unobstructed.

• Install horizontally with vent hole upward
• Use approved propane thread sealant; test all connections for leaks
• Perform periodic inspections for wear or damage

Who is this for: This Flame King regulator is built for owners and operators of larger RVs, campers, food trucks, commercial mobile units, and standby generators that require a high-flow, dependable propane supply. Choose it when you need a rugged, dual-stage regulator that pairs POL tank compatibility with an 11-inch water column output to run multiple high-BTU appliances reliably.