Seamless Propane Supply for Dual Tank Systems
The Flame King ACR-2 Automatic Changeover Regulator Kit ensures a steady flow of propane to your RV, even when one tank runs out. Designed for dual-cylinder systems, this smart regulator automatically switches from your primary tank to the reserve without interrupting your supply - so your heat, appliances, and comfort are never compromised.
Smart, Automatic Changeover System
No more manual tank swaps. When the primary tank empties, the built-in changeover system seamlessly pulls propane from the reserve tank. Just rotate the lever to reset the indicator, and you're ready to refill the empty tank without losing pressure or flame.
Clear, Easy-to-Read Indicator
The front-facing indicator shows clear when the active tank has propane and switches to red when empty - giving you a visual cue to refill. It's a quick and easy way to monitor your propane levels.
Dual 12-Inch Pigtail Hoses Included
This kit includes two 12-inch pigtail hoses to connect each tank to the regulator, providing flexible reach and a secure, leak-free fit.
Consistent, Stable Pressure
A double-stage regulator design maintains a constant 11” WC (water column) pressure - the optimal setting for most RV appliances - regardless of changing propane demand or outside conditions.
Built for Performance
With a high flow capacity of up to 345,200 BTU, this UL-listed regulator supports everything from RV heating and cooking to water heaters and outdoor grills. Inlets feature 1/4" SAE inverted flare fittings; the outlet is 3/8" NPT female pipe thread.
Pairs perfectly with Flame King's 48" Thermoplastic Hose Model MB100383-48 (sold separately)
Specifications:
- Weight: 2.6 lb
- Dimensions: 7 x 4 x 4 inches
- Pressure Setting: 11” WC (factory set)
- BTU Rating: 345,200 BTU
- Turn the Lever towards a tank.
- If there is propane in the tank, the indicator will go clear.
- Propane will begin to flow from this tank ONLY through the regulator and to the appliances.
- When the tank runs out of propane, the indicator will show RED and the regulator will automatically switch over to pulling propane from the other tank.
- Rotate the lever to the other side and the indicator will go clear again.
- This will allow you to remove the empty tank and get it refilled.
- Propane will flow from the second one while you get the first one refilled.



