For RVs, campers, and trailers, automatic changeover regulators ensure a seamless propane supply by switching from a primary tank to a reserve tank when needed. The following selections represent reliable 2-stage changeover valves that support dual-tank setups, offer gauges or indicators, and are built to handle substantial BTU outputs. Each product focuses on uninterrupted gas flow, easy tank removal, and compatibility with standard RV fittings.
| Product | Brand | BTU Capacity | Key Feature |
|---|---|---|---|
| KT12ACR-2 | Flame King | 345,200 BTU | Dual 12″ pigtails; automatic switch; UL Listed |
| KT18ACR-2 | Flame King | 345,200 BTU | Longer dual 18″ pigtails; automatic switch; UL Listed |
| Devvicoo 2-Stage Regulator | Devvicoo | 210,000 BTU primary; 130,000 BTU reserve | Gauge; universal 1/4″ flare; brass construction |
| KT12ACR-2a | Flame King | 345,200 BTU | Compact dual-tank regulator; two 12″ pigtails; UL Listed |
| Fairview GR-9984 | Fairview | 345,000 BTU | Two-stage; 11″ WC; dual-tank auto changeover |
Flame King KT12ACR-2: 2-Stage Auto Changeover Regulator
The Flame King KT12ACR-2 provides a 2-stage automatic changeover suitable for RVs with dual propane tanks. It includes two 12-inch pigtails to connect to the tanks or supply, enabling a smooth transition from primary to reserve without interruption. It is UL Listed, with inlets rated at 1/4″ SAE inverted flare and a 3/8″ NPT female outlet, and supports up to 345,200 BTU. This model is designed for quick tank removal during refills while maintaining an uninterrupted gas supply to appliances.
Flame King KT18ACR-2: 2-Stage Auto Changeover with 18″ Pigtails
This model extends the pigtail length to 18 inches, aiding installation flexibility for dual-tank RV setups. Like the 12-inch variant, it features automatic switching, UL listing, and standard 1/4″ SAE inverted flare inlets with a 3/8″ NPT outlet. Rated at 345,200 BTU, it supports high-demand RV applications while allowing easy removal of an empty tank without interrupting propane service.
Devvicoo 2-Stage Regulator With Gauge and 18″ Braided Hose
The Devvicoo regulator features automatic tank switching with a visual gauge indicator to show when a tank needs refilling, ensuring uninterrupted supply for RVs and campers. It fits most RVs, trailers, and campers with dual 5-40 lb tanks. It uses 1/4″ SAE inverted flare inlets and a 3/8″ NPT female outlet, built with brass for durability. The master cylinder handles up to 210,000 BTU/hour with reserve at 130,000 BTU/hour, supporting steady gas flow across weather conditions.
Flame King ACR-2a: Compact Auto Changeover Regulator
The Flame King ACR-2a offers a two-stage auto changeover without included pigtails. It maintains the same switching logic and UL listing as other Flame King models, with 1/4″ SAE inverted flare inlets and a 3/8″ NPT female outlet. Its compact design is suitable for RVs with limited space, while still delivering dependable dual-tank operation for continuous cooking, heating, and hot water supply.
NQN 2-Stage Changeover With Gauge and 18″ Hose
The NQN regulator supports automatic switching between primary and reserve tanks, with a color-changing gauge indicator to signal when a tank requires refilling. It ships with 18″ RV pigtail hoses and stainless braided construction, ensuring durability in outdoor settings. The product uses 1/4″ SAE inverted flare inlets and a 3/8″ NPT outlet, delivering up to 210,000 BTU/hour primary and 130,000 BTU/hour reserve capacity. All brass fittings provide robust performance.
Buying Guide: Key Considerations for Automatic Changeover Valves
- Tank compatibility: Confirm the regulator supports dual-tank RV setups and matches your tank sizes (commonly 5-40 lb cylinders).
- BTU capacity: Check the regulator’s primary and reserve BTU ratings to ensure it can feed all appliances in cold or high-demand conditions.
- Inlet/outlet fittings: Ensure 1/4″ SAE inverted flare inlets and a 3/8″ NPT outlet align with your hoses and connectors.
- Indication and gauges: Models with color indicators or gauges help monitor tank levels and prompt refills before depletion.
- Pigtail length: Longer pigtails offer installation flexibility but require additional space and may impact weight distribution.
- Installation ease: Look for kits that include hoses or pigtails and straightforward mounting instructions for RV setups.
- Durability and weather resistance: Brass construction and corrosion resistance extend regulator life in outdoor environments.
- Safety certifications: UL-listed or CSA-certified regulators provide added assurance of compliance and safety.
- Maintenance and replacements: Availability of replacement parts and ease of servicing are practical considerations for long-term use.
- Warranty and support: Check manufacturer warranties and accessibility of customer service for troubleshooting and replacements.
Overall, selecting a dual-tank automatic propane changeover regulator involves balancing BTU capacity, hose length, and the presence of gauges with the practical realities of your RV’s storage and usage patterns. The models listed above are among the commonly recommended options for American RV owners seeking reliable, uninterrupted propane supply across dual-tank configurations.