Flame King KT18ACR-2 2-Stage Auto Changeover Regulator - Dual Tank

In this review the Flame King KT18ACR-2 is examined as a practical solution for RV owners who need uninterrupted propane when running appliances. The bottom line: it is built for dual-tank RV systems that require automatic switching and easy tank removal, and it delivers steady pressure while letting users swap an empty cylinder without shutting down the supply. Installation is straightforward for anyone comfortable with basic propane fittings, and the two included 18in pigtails mean the unit is ready to hook up right away.

Key Features

• Automatic changeover: Automatically switches from primary to reserve tank when the main tank runs out, so appliances keep running without manual intervention.
• Two 18in pigtails included: Comes with both pigtails needed to connect the regulator to dual tanks, making installation simpler for RV setups.
• Double-stage design: Maintains a constant gas pressure under changing demand and operating conditions for more stable appliance performance.
• Factory set pressure: The regulator is factory set at 11WC, providing a predictable operating pressure for typical RV propane systems.
• High capacity: Rated for 345,200 BTU, so it supports multiple appliances running together in most recreational vehicles.
• Standard fittings: Inlets are 1/4in SAE inverted flare and the outlet is 3/8in NPT female pipe thread, compatible with common RV plumbing and hoses.

Who It's For

The KT18ACR-2 is aimed at RV, van, and trailer owners who use dual propane cylinders and need a reliable automatic changeover so they can refill an empty tank without interrupting the gas supply. It is especially useful for users who want a factory-set regulator that pairs with standard hoses and fittings.

It may be less suitable for those who need a manual-only selector or who require nonstandard inlet/outlet threads; also, any user concerned about long-term plastic component durability should evaluate installation points and check for reports in real installations.

Pros & Cons

Pros

• Includes both 18in pigtails for immediate hookup and a perfect fit with common RV systems.
• Automatic switching provides continuous supply so appliances are not interrupted when a tank is empty.
• Double-stage regulator and 11WC factory setting deliver steady pressure under varying loads.
• UL listed construction and a high BTU rating support safe, heavy-duty RV use.

Cons

• Some users report occasional issues with the automatic switching function, so monitoring after installation is advised.
• A few reviews raised concerns about plastic component durability, so long-term resilience may vary by usage.

Specifications

Our Verdict

The Flame King KT18ACR-2 is a practical, value-oriented regulator for RV owners who want an automatic dual-tank changeover and stable gas pressure. It includes the necessary pigtails and standard fittings for quick installation and handles heavy appliance loads, making it a sensible upgrade for most dual-tank systems, provided customers monitor switching behavior after installation.

Frequently Asked Questions

Can I replace one tank while the regulator is installed?
Yes. The unit is designed to allow removal and refill of an empty cylinder without interrupting the propane supply by switching to the reserve tank.

What hose or accessory pairs well with this regulator?
It pairs well with a 48in thermoplastic hose and uses common 1/4in SAE inverted flare inlets and a 3/8in NPT outlet.

Is the regulator safe for heavy appliance use?
The regulator is UL listed and rated for 345,200 BTU, which supports multiple RV appliances operating together.