Flame King ACR-2a 2-Stage Auto Changeover LP Regulator for RVs, Vans, Trailers — Without Pigtails

Overview

The Flame King ACR-2a is a two stage auto changeover propane regulator designed for vehicles with dual tanks, such as RVs, vans, and trailers. It provides a hands-free transition between cylinders, helping you maintain a steady supply as you move from one tank to another. Built for practical use on the road, this regulator focuses on reliability, safety, and compatibility with common Flame King components.

Key benefits

• Seamless cylinder changes without gas interruptions, thanks to automatic switching between primary and reserve tanks.
• Double-stage design helps keep gas pressure stable as demand shifts, supporting consistent operation of propane appliances.
• UL listed construction with solid connections intended to minimize leaks and improve long-term performance.

Real-world practicality

On a multi-day trip or remote campsite, you may not always have time to refill at exact intervals. The ACR-2a offers a practical solution by enabling a smooth handoff from the tank in use to the backup tank, reducing the need to pause for refills. Its compatibility with Flame King hoses and pigtails provides flexible setup options for different rigs.

Specifications and safety notes

• Inlets: 1/4-inch SAE inverted flare; Outlet: 3/8-inch NPT female pipe thread; rated for 345,200 BTU.
• Double-stage regulation maintains steadier pressure under changing demand; factory setting is 11 inches of water column; lockout pressure up to 14.9 inches WC.
• Compatible with Flame King 48-inch Thermo Plastic Hose (Model 100383-48) and 12-18 inch inverted flare pigtails (Models E12INPT, E15INPT, E18INPT).
• Critical connections are assembled with high-strength thread-locker on adapter fittings to help prevent leaks during use.
• Note: NPT pigtails are not recommended.

Installation and usage tips

• This regulator is designed without pigtails, allowing you to pair it with Flame King hoses or compatible components per your setup.
• Ensure all fittings are secure and periodically inspect connections for wear or looseness to maintain safe operation.

Overall, the Flame King ACR-2a focuses on practical dual-tank operation, offering the potential for smoother propane management during travel. It presents a flexible option for campers and road travelers who want adaptable, user-friendly fuel regulation without overpromising results.