Instant, uninterrupted propane flow is essential for RV cooking, heating, and hot water. This guide highlights top automatic changeover regulators designed for dual-tank RV systems, explains who each product is best for, and helps you compare features like BTU rating, inlet/outlet sizes, and pigtail lengths. The selections below target buyers who want reliable, two-stage changeover with dual-tank support, easy refill without service interruption, and clear indications of tank status. Useful for full-time travelers, seasonal campers, and weekend RVers alike.
Product Comparision Overview
| Product | BTU Capacity | Tank Support | Inlet/Outlet | Best For |
|---|---|---|---|---|
| Flame King KT12ACR-2 | 345,200 BTU | Dual tanks | Inlets 1/4″ SAE inverted flare; outlet 3/8″ NPT | |
| Fairview GR-9984 | 345,000 BTU | Dual tanks | Inlets 1/4″ inverted flare; outlet 3/8″ NPT | |
| Flame King KT18ACR-2 | 345,200 BTU | Dual tanks | Inlets 1/4″ SAE inverted flare; outlet 3/8″ NPT | |
| Flame King ACR-2a | 345,200 BTU | Dual tanks | Inlets 1/4″ SAE inverted flare; outlet 3/8″ NPT | |
| Devvicoo 2-Stage Regulator | 210,000 BTU (master); 130,000 BTU (reserve) | Dual tanks | Inlets 1/4″ SAE inverted flare; outlet 3/8″ NPT |
Flame King KT12ACR-2 2-Stage Auto Changeover
Best for: RVers with two standard propane tanks who need seamless switchovers without interrupting gas supply. This regulator includes two 12-inch pigtails to connect to tanks or supply lines, and it automatically switches from primary to reserve when the primary is empty. It is UL Listed and rated for up to 345,200 BTU. The dual-tank capability makes it a solid fit for longer trips or full-time RVers.
Why chosen: The built-in auto-changeover, compact 12-inch pigtails, and UL listing provide a balance of convenience and safety. The 1/4″ SAE inverted flare inlets and 3/8″ NPT outlet align with common RV gas plumbing. Best for: users who want straightforward dual-tank operation with quick tank changes and a proven regulator design.
Limitations: Pigtail length is fixed at 12 inches; longer hoses may require adapters or different models if your system layout differs. Ensure compatibility with your RV’s LP system before purchase.
Fairview GR-9984 RV Camper LP Regulator
Best for: RVers needing high-capacity, reliable two-stage performance with strong cold-weather flow. The regulator maintains a steady 11″ water column for consistent appliance fuel supply, even in chilly mornings, and supports up to 345,000 BTU with reserve flow. It’s a good pick for users who travel in colder seasons or in high-demand scenarios where stable gas pressure matters.
Why chosen: Two-stage design reduces pressure fluctuations, ensuring smoother operation of stoves, heaters, and water heaters. This model emphasizes uninterrupted service between service and reserve tanks, a key factor for longer trips.
Limitations: Some setups may require additional mounting hardware or adapters to fit specific RV configurations. Confirm hose compatibility with your LP system.
Flame King KT18ACR-2 2-Stage Auto Changeover
Best for: RV owners who need robust dual-tank changeover with a longer 18-inch pigtail setup for flexible tank placement. It shares the same two-stage protection and UL listing as the KT12 model, with a high BTU rating of 345,200. This is ideal for larger RVs or setups where tanks are positioned farther apart.
Why chosen: The longer pigtail length offers more installation flexibility and can simplify routing in crowded bays. The two-stage design reduces pressure surges, supporting stable appliance performance in variable tank conditions.
Limitations: Longer hoses may add weight and potential flex; ensure proper securing and routing to avoid kinks or abrasion.
Flame King ACR-2a 2-Stage Regulator (No Pigtails)
Best for: RV owners who already have compatible hoses and prefer purchasing regulator components separately. This model maintains automatic switching between primary and reserve tanks and is UL Listed, with 345,200 BTU capacity. No pigtails are included, so you can choose compatible connections you already own.
Why chosen: It provides a versatile option for established RV setups needing a two-stage regulator without pigtails. Choosing this model allows customization of hose lengths and fittings to fit unique RV layouts.
Limitations: Absence of pigtails means additional components must be sourced separately, potentially increasing overall setup cost and complexity.
Flame King KT12ACR-2a 2-Stage Auto Changeover
Best for: RV travelers who want a compact 12-inch pigtail option with reliable two-stage performance. It is UL Listed, supports dual tanks, and is rated at 345,200 BTU. This choice blends portability with dependable changeover for typical RV layouts.
Why chosen: The 12-inch pigtails offer a balance between ease of installation and compact space usage. It’s a ready-to-use solution for standard dual-tank arrangements.
Limitations: As with other 12-inch models, pigtail length cannot be adjusted without replacing parts or models.
Buying Guide: How To Choose The Right Changeover Regulator
What to consider before buying a dual-tank changeover regulator for RVs:
- Tank configuration: Ensure the regulator supports your number of tanks and the hose arrangement in your RV. Dual-tank systems require a regulator designed for two tanks with automatic switching.
- BTU capacity: Most RV regulators in this range handle around 345,000 BTU. Match this with your appliances’ total demand to avoid flow limitations in cold weather or high-use periods.
- Inlet/outlet fittings: Check that inlets are 1/4″ SAE inverted flare and the outlet is 3/8″ NPT; confirm compatibility with your hoses and adapters.
- Pigtail length: Some units include 12″ or 18″ pigtails. Longer pigtails offer installation flexibility but require longer routing paths in the RV bay.
- Cold-weather performance: If you camp in cold climates, choose regulators designed to maintain steady pressure and flow in low temperatures.
- Safety and certification: UL Listed and CSA certifications indicate compliance with safety standards for gas regulation in vehicles.
- Maintenance indicators: Color indicators or gauges can help you monitor tank status and anticipate refills.
Frequently Asked Questions
- What is a 2-stage automatic changeover regulator?
It automatically switches from the service tank to the reserve tank when the service tank empties, ensuring uninterrupted propane supply to RV appliances.
- Do all RV regulators require pigtails?
No. Some models include pigtails; others are sold without them. Check what comes in the package and plan for compatible hoses if needed.
- Can I use a single-tank regulator for dual-tank RV setups?
Not recommended. A dual-tank regulator is designed to manage two tanks and switch between them safely; using a single-tank regulator may cause fuel starvation and safety issues.
- Are these regulators safe in cold weather?
Most high-capacity regulators are designed for cold-weather RV use, maintaining steadier flow. Verify the cold-weather performance spec for your chosen model.
- What installation considerations should I know?
Ensure proper mounting, secure hose routing, and correct fittings to prevent leaks. Follow the manufacturer’s instructions and use approved adapters if needed.
- Do these regulators come with gauges?
Some models include gauges or indicators; others do not. If you need tank status visibility, look for a model with a clear alert feature or add a compatible gauge.