Flame King KT12ACR-2 2-Stage Auto Changeover Propane Regulator - Dual

In this review of the Flame King KT12ACR-2 regulator, the bottom line is simple: it is a practical, no-nonsense solution for RV owners who need automatic tank switching so they can refill an empty cylinder without interrupting propane supply. The reviewer found the unit straightforward to install and appreciated that it comes with two 12-in pigtails, a clear visual indicator for tank depletion, and a double-stage design that maintains steady pressure during changing demand. It is best for users who want reliable auto changeover functionality and an easy swap-in replacement for dual-tank RV systems.

Key Features

• Auto changeover: Automatically switches from primary to reserve tank when the first tank is empty, keeping appliances running without manual intervention.
• Included pigtails: Comes with two 12-in pigtails to connect both tanks quickly, saving a separate hose purchase for most installations.
• Pressure stability: Double-stage design and factory set 11WC maintain consistent gas pressure under varying loads for safer, steadier appliance performance.
• High capacity: Rated for 345,200 BTU so it can handle typical RV appliance loads without restricting flow.
• Standard fittings: Uses 1/4-in SAE inverted flare inlets and a 3/8-in NPT female outlet for common compatibility with RV propane plumbing.
• Safety listing: UL Listed regulator for component-level assurance and adherence to recognized safety standards.

Who It's For

The Flame King KT12ACR-2 is aimed at RV, trailer, and van owners who run dual propane tanks and want a hands-off solution that automatically switches tanks so cooking, heating, and refrigeration continue uninterrupted. Installers who prefer a regulator that arrives with pigtails will appreciate the convenience and time saved.

It is less appropriate for single-tank setups or for users who need stainless or all-metal fittings exclusively, since some customers reported issues with plastic fitting durability and occasional leakage at hose connections; those needing heavy-duty marine fittings or custom plumbing should look elsewhere.

Pros & Cons

Pros

• Includes two 12-in pigtails for quick connection and immediate installation.
• Automatic switching keeps propane supply continuous when a tank empties.
• Double-stage design and 11WC factory setting deliver steady pressure under load.
• Good value and straightforward fit for common RV systems.

Cons

• Some users report leakage at hose connections, so careful installation and proper sealing are important.
• Plastic fittings have been reported to become brittle over very long term use, so check plastics if used in harsh environments.

Specifications

Our Verdict

The Flame King KT12ACR-2 is a sensible, value-focused choice for RV owners who need reliable auto changeover between dual tanks and want the convenience of included pigtails and steady double-stage pressure. It delivers practical functionality and ease of installation for most recreational vehicle setups, though attention to hose connections and periodic inspection of plastic fittings will help avoid the occasional leakage or durability issue.

Frequently Asked Questions

Does it switch tanks automatically?
Yes, the regulator automatically switches from the primary to the reserve tank when the first is depleted.

Are the hoses included?
Yes, two 12-in pigtails are included to connect the regulator to each propane tank.

What fittings does it use?
The inlets are 1/4-in SAE inverted flare and the outlet is a 3/8-in NPT female thread.