Flame King 150,000 BTU Vertical Two-Stage Propane Regulator for RVs — 100 lb/ASME Tanks, Rain Cover

Flame King’s 150,000 BTU vertical two-stage propane regulator delivers steady, high-volume LP gas flow for larger RVs, campers, food trucks and generators.

This high-capacity regulator is built to keep appliances running reliably when demand is high. Its dual-stage design reduces pressure swings as burners cycle on and off, and the heavy-duty aluminum body and standardized fittings create a secure, weather-resistant connection to 100 lb and ASME tanks. The unit is vertical-mounted and includes a rain cover and a top vent to help protect the internal mechanism.

How does the two-stage design improve propane performance?

The regulator uses a first stage to drop tank pressure to an intermediate level and a second stage to deliver a consistent outlet pressure, which minimizes surges and ensures steady flame performance across multiple appliances. That stability helps prevent pilot outages and inconsistent heating when several burners or heaters run at once.

• Stage 1 reduces high tank pressure initially for safety and balance
• Stage 2 maintains an accurate outlet pressure to appliances
• Reduces cycling noise and pressure fluctuations under varying demand

What connections and pressure ratings should I expect?

The Flame King regulator accepts the common 1/4" female 18 NPT tank inlet and provides a 3/8"-18 NPT outlet to tie into typical RV gas lines. It is rated to deliver an outlet pressure of approximately 11 inches water column and supports a maximum throughput of 150,000 BTU per hour, suitable for high-BTU setups.

• Standard 1/4" female 18 NPT inlet for broad tank compatibility
• 3/8"-18 NPT outlet matches many RV gas line fittings
• 11" WC outlet pressure and 150,000 BTU/hr capacity

Is the regulator durable and weather resistant for outdoor use?

Yes—the body is machined from heavy-duty aluminum to resist corrosion and maintain secure threads and sealing surfaces. A factory-provided rain cover shields the vent and diaphragm area from direct exposure, and the vertical mounting orientation helps shed water away from critical parts.

• Aluminum construction for strength and corrosion resistance
• Included rain cover protects the vent and mechanism
• Vertical mount design reduces moisture pooling at the vent

How will this regulator fit into my RV or generator setup?

The regulator is sized and fitted to work with common RV and generator plumbing, including 100 lb and ASME tanks used on larger vehicles. Because of its high BTU capacity and consistent outlet pressure, it pairs well with multiple simultaneous appliances—ovens, furnaces, water heaters, and ranges—found in larger rigs and commercial food vehicles.

• Works with 100 lb and ASME tanks commonly used on larger rigs
• Designed for vertical mounting on tank or bracket locations
• Suitable for multiple-appliance systems with high combined BTU need

Who is this for: This Flame King regulator is for RV owners, vanlifers, food truck operators and anyone with high-demand LP appliances who needs a reliable, high-capacity regulator. Choose it if you run multiple burners or large heating appliances at once, require a secure aluminum regulator body for outdoor use, and need standard fittings for straightforward installation into existing propane plumbing.