The best RV propane regulator for two tanks depends on whether you prioritize a known regulator brand, included hose features, or a compact design. The Flame King models suit RV owners seeking a listed regulator with a high stated BTU rating, while the RecPro is a compact option with QCC1 hoses. Two other kits add gauges and longer braided pigtails for tank monitoring and flexible installation. Before buying, compare the inlet and outlet fittings with your RV’s existing connections.
| Product | Best For | Standout Feature |
|---|---|---|
| Flame King KT12ACR-2 | High stated capacity | 345,200 BTU rating |
| PYXGLAQ two-tank kit | Tank monitoring | Gauge-equipped hoses |
| RecPro auto changeover | Compact setup | 2.5-pound weight |
| 18-inch braided hose kit | Longer pigtails | 18-inch hoses and gauge |
| Flame King KT12ACR-2a | Alternative Flame King listing | 12-inch pigtails included |
Flame King KT12ACR-2 Two-Stage Regulator
This two-stage regulator is designed for RVs, vans, and trailers with dual propane tanks. It automatically changes from the primary cylinder to the reserve cylinder when the primary is empty. The listing says the empty cylinder can be removed for refilling without interrupting propane supply.
Best for: RV owners who want automatic changeover and a clearly stated high capacity. It includes two 12-inch pigtails, is UL listed, and is rated for 345,200 BTU. Its inlets are 1/4-inch SAE inverted flare, and its outlet is 3/8-inch NPT female pipe thread.
Limitation: The included pigtails are 12 inches long, so check whether that length suits your tank arrangement and connection location.
PYXGLAQ Two-Tank Regulator And Hose Kit
This kit combines a two-stage auto-changeover regulator with dual tank hoses and a propane tank gauge. The listing describes solid brass fittings and stainless-steel-braided pigtails. It states capacities of 210,000 BTU per hour for the primary cylinder and 130,000 BTU per hour for the reserve cylinder.
Best for: Buyers who want a gauge-equipped hose kit and a visual indication of which cylinder needs attention. The listing says the indicator changes color when a tank is depleted and that the setup can change tanks without interrupting supply. Its fittings are 1/4-inch SAE inverted flare inlets and a 3/8-inch NPT female outlet.
Limitation: The stated primary and reserve capacities differ. Confirm that the listed fittings and capacity meet your RV system’s requirements before purchasing.
RecPro Two-Stage Auto Changeover Regulator
The RecPro regulator automatically switches to the full tank when the other tank empties, with a red indicator window signaling the change. Pigtails are included, and the listed weight is 2.5 pounds. Its compact dimensions are 2¾ inches wide by 6¼ inches high by 6¼ inches deep.
Best for: RV owners who want a compact dual-tank regulator and QCC1 hoses. The listing identifies a flow limiter and check valve on the hoses, a maximum working pressure of 250 PSI, 1/4-inch female NPT inlets, and a 3/8-inch female NPT outlet.
Limitation: The listing does not provide a BTU capacity. Check with the RV or appliance manufacturer if you need to verify regulator capacity for your system.
Auto Changeover Regulator With 18-Inch Hoses
This kit has two 18-inch stainless-steel-braided pigtails, a tank pressure gauge, and an automatic changeover system. The listing states that a red indicator means a tank is empty or off, while green indicates normal operation. It lists primary capacity at 210,000 BTU per hour and reserve capacity at 130,000 BTU per hour.
Best for: Buyers who need longer pigtails and want a gauge for checking tank pressure. Listed connections include QCC1 and 1/4-inch SAE inverted flare inlets, a 3/8-inch female NPT outlet, and a 1/4-inch male quick-disconnect plug on the hose.
Limitation: Its connection details include several fitting types. Verify each connection against your RV installation before ordering.
Flame King KT12ACR-2a Regulator
This listing describes a two-stage regulator for dual-tank RVs, vans, and trailers. It automatically switches from the primary cylinder to the reserve cylinder and includes two 12-inch pigtails. The listing gives a 345,200 BTU rating and identifies the regulator as UL listed.
Best for: Buyers comparing Flame King listings who want automatic tank changeover, included short pigtails, and the stated 345,200 BTU rating. The listed connections are 1/4-inch SAE inverted flare inlets and a 3/8-inch NPT female pipe-thread outlet.
Limitation: The product details closely match the other Flame King listing. Compare the exact listing and part number to avoid ordering a duplicate model unintentionally.
Buying Guide: Choosing An RV Two-Tank Regulator
Do you need automatic changeover?
Automatic changeover regulators draw from a primary cylinder and switch to a reserve cylinder when the primary runs out. This can keep propane flowing while you arrange to refill the empty tank. Indicator designs vary: some listings describe a red window, while others describe color changes or red and green signals. Check the product details to understand the indicator for your chosen model.
Which fittings and hose length should you check?
Compare the regulator’s inlet and outlet specifications with your RV’s existing connections. Product listings identify fittings such as QCC1, 1/4-inch SAE inverted flare, 1/4-inch female NPT, and 3/8-inch female NPT. Do not assume that similar-looking connectors are interchangeable. Pigtail lengths also vary: the Flame King models include 12-inch hoses, while one kit lists 18-inch hoses.
How much capacity does your system require?
Use the capacity specified by your RV or appliance manufacturer when comparing regulators. The listed products report different capacities, and some provide separate primary and reserve figures. A high rating alone does not confirm that a regulator is suitable for a particular installation; confirm the full system requirements and fittings before buying.
Is a gauge useful?
A gauge or indicator can help you identify tank status without relying only on an automatic switch. Some listed kits include a pressure gauge, while others rely on a regulator indicator window. Read the product description carefully: an indicator’s stated purpose and the listed hose fittings may differ between kits.
Frequently Asked Questions
What does an RV two-tank propane regulator do?
It connects two propane cylinders to an RV gas system and, on an automatic changeover model, switches supply from the primary cylinder to the reserve cylinder when the primary is empty.
Can I refill one tank while the other supplies propane?
The Flame King listings state that the empty cylinder can be removed for refilling without interrupting the supply. Confirm the instructions for the specific regulator and follow safe handling procedures.
Are all two-tank RV regulators interchangeable?
No. Inlet and outlet fittings, hose connections, and capacity can vary. Match the specifications to your RV system rather than choosing by appearance alone.
What is the difference between a two-stage regulator and automatic changeover?
Two-stage describes the regulator’s pressure-reduction design. Automatic changeover describes the switching function between two cylinders. A product can have both features, as the listed models do.