Flame King KT12ACR-2a 2-Stage Auto Changeover LP Regulator - Dual Tank

In this review the Flame King KT12ACR-2a is evaluated as a practical solution for RV owners and vanlifers who need uninterrupted propane during travel. The single biggest reason to buy is its automatic two-stage changeover operation that lets one tank be removed and refilled while the other supplies gas, providing continuous service without manual switching. The reviewer found installation straightforward thanks to the included 12in pigtails and the clear indicator that shows when a cylinder is depleted, making it a sensible pick for those who want a low-fuss dual-tank setup.

Key Features

• Auto changeover: Automatically switches from the primary tank to the reserve when the first tank runs out, preventing interruptions in propane supply.
• Included pigtails: Comes with two 12in pigtails so the regulator can be connected immediately to both propane tanks without buying extra hoses.
• Double-stage regulation: The two-stage design helps maintain steady gas pressure under changing demand and environmental conditions, which is useful for appliances that cycle.
• Indicator alert: A visible indicator changes color to show when a tank is depleted, making tank management simple while on the road.
• High capacity: Rated for 345,200 BTU so it can handle multiple RV appliances simultaneously within typical recreational setups.
• Standard fittings: Uses 1/4in SAE inverted flare inlets and a 3/8in NPT female outlet for straightforward compatibility with common fittings.

Who It's For

The Flame King KT12ACR-2a is best for RV owners, trailer users, and van converters who run on two propane cylinders and value uninterrupted service during longer trips or when one cylinder needs to be refilled. Its automatic swap and depletion indicator are particularly helpful for single-operator rigs or families that want a maintenance-light solution.

Those who should look elsewhere are users who need stainless-steel or heavy-duty braided hoses due to harsh off-road conditions, or anyone wanting a regulator with adjustable output settings beyond the factory 11WC, since this model is factory set and intended as a straightforward, ready-to-use regulator.

Pros & Cons

Pros

• Automatic switching maintains continuous propane supply without manual intervention.
• Two included 12in pigtails simplify installation and get systems running quickly.
• Double-stage design and 345,200 BTU rating support typical RV appliance loads reliably.
• Clear depletion indicator reduces guesswork about when to refill a tank.

Cons

• Some customers report concerns about hose and plastic durability, so heavy-duty applications may require upgraded hoses.

Specifications

Brand	Flame King
Model	KT12ACR-2a
Type	2-stage auto changeover regulator
Inlet	1/4in SAE inverted flare
Outlet	3/8in NPT female pipe thread
Included hoses	Two 12in pigtails
Factory set pressure	11WC (water column)
BTU rating	345,200 BTU

Our Verdict

The Flame King KT12ACR-2a is a practical, value-focused auto-changeover regulator for most RVs and trailers that run dual propane tanks; it provides continuous service, useful visual indication of a depleted tank, and simple installation with the included pigtails. It represents good value for owners who want a ready-to-use dual-tank system, though users with extreme durability needs may want to upgrade hoses or fittings.

Frequently Asked Questions

Can I remove an empty tank while the other one feeds the camper?
Yes. The regulator is designed to let you remove and refill an empty cylinder without interrupting propane supply because it automatically switches to the reserve tank.

What fittings does this regulator use?
The inlets are 1/4in SAE inverted flare and the outlet is 3/8in NPT female pipe thread, so it connects to common propane fittings and hoses.

Is the regulator adjustable?
No. This unit is factory set at 11WC and uses a double-stage design to maintain constant pressure rather than offering user adjustment.