Flame King two-stage auto changeover propane regulator KT15ACR-2 with two 15" pigtails — 345,200 BTU, factory-set 11WC

The Flame King KT15ACR-2 is a two-stage, automatic changeover propane regulator with two 15-inch pigtails designed to keep RV, van, or trailer gas systems running uninterrupted when switching between dual tanks.

Built for mobile living and on-the-road convenience, this regulator automatically switches from the primary to the reserve tank when the first is depleted, allowing you to remove and refill the empty cylinder without losing propane supply. UL listed and factory-set to 11WC (water column), the KT15ACR-2 supports high-demand appliances with a rated 345,200 BTU capacity and features industry-standard inlet and outlet fittings for easy installation.

How does the automatic changeover work and why does it matter?

The KT15ACR-2 monitors tank pressure and flips to the reserve tank as the primary empties, all without manual intervention. This eliminates sudden interruptions to cooking, heating, or refrigeration when a single tank runs out. It also prevents the need to shut down appliances during propane cylinder swaps.

• Automatic transfer from primary to reserve tank when pressure drops
• Permits hot swap of the empty cylinder for refill without service interruption
• Two 15-inch pigtails included to connect both tanks directly to the regulator

Will this regulator meet my RV’s pressure and flow requirements?

Yes—this dual-stage regulator is rated for 345,200 BTU and maintains steady outlet pressure under variable demand. The double-stage design reduces pressure fluctuation as appliance usage changes, improving appliance performance and safety. Inlets and outlets use common thread types for compatibility with typical RV gas plumbing.

• Double-stage design stabilizes pressure across varying loads
• Inlets: 1/4" SAE inverted flare; outlet: 3/8" NPT female pipe thread
• Factory-set to 11WC for standard RV appliance operation

How do I install and connect the KT15ACR-2 in my trailer or van?

Installation is straightforward for anyone familiar with RV propane systems: mount the regulator securely, attach the two supplied 15-inch pigtails to the tank valves, and connect the outlet to your vehicle’s supply line. If you prefer a longer run, this regulator pairs with Flame King’s 48-inch thermoplastic hose. Always follow local codes and, when in doubt, have a qualified technician complete the work.

• Mount regulator in a ventilated, accessible location
• Connect 15-inch pigtails to each tank’s 1/4" SAE inverted flare inlet
• Attach outlet to 3/8" NPT female pipe thread supply line; use appropriate sealants

What maintenance or compatibility considerations should I know?

The KT15ACR-2 is UL listed and factory-adjusted, requiring minimal upkeep beyond routine inspections. Check fittings and hoses periodically for leaks, wear, or damage and replace any compromised components. Use approved hoses and fittings and verify that your appliances and piping match the regulator’s pressure and thread types.

• Inspect hoses and connections regularly for leaks or cracks
• Pair with compatible hoses (e.g., Flame King 48-inch thermoplastic) when needed
• Replace regulator or hoses if corrosion or damage is present

Who is this for: The Flame King KT15ACR-2 is intended for RV owners, van lifers, and trailer users who rely on dual propane cylinders and want uninterrupted fuel supply during tank swaps. It’s ideal for outfitting older rigs or upgrading existing single-stage systems where consistent pressure, higher BTU capacity, and automatic reserve switching improve on-board comfort and convenience. If you need a UL-listed, easy-to-install solution to manage two propane tanks with reliable pressure performance, this regulator is built for that role.