Flame King (KT12ACR-2a) 2-Stage Auto Changeover LP Propane Gas Regulator With Two 12 Inch Pigtails For RVs, Vans, Trailers
Condition: New
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Availability:
In Stock.
Arrives
Sunday, Aug 9
Size: Regulator with 12-inch Pigtails
Features
- Allows removal of the empty cylinder for refill without interrupting propane supply; includes 2 of the 12-inch pigtails to connect the regulator to the propane tank or propane supply
- For RVs with dual propane tanks; it automatically switches from primary to reserve tank when the primary tank is empty
- UL Listed Regulator, inlets are 1/4" SAE inverted flare and the outlet is 3/8" NPT female pipe thread; rated for 345,200 BTU
- Pairs well with our 48-inch thermoplastic hose; regulator is factory set at 11WC (water column)
- Double-stage design maintains constant gas pressure under changing demand and conditions
Description
The Auto-Changeover LP Regulator allows you to hook up 2 Propane tanks and the regulator automatically switches over to the second tank once the first one runs out (and vice versa). The indicator changes color to let you know when a tank has been depleted and needs to be refilled. The inlet is a 1/4" SAE inverted flare and the outlet is a 3/8" NPT female. Also included are 2 of the 12" pigtails to connect the regulator to the propane tank or propane supply.
Manufacturer: Flame King
Brand: Flame King
Model: KT12ACR-2a
Item Weight: 2.4 pounds
Product Dimensions: 7 x 4 x 4 inches
Item model number: KT12ACR-2a
Exterior: Machined
Manufacturer Part Number: KT12ACR-2a
Date First Available: March 4, 2021
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Aug 9
This item is non-returnable:
Non-returnable. Transportation of this item is subject to hazardous materials regulation
View our full returns policy here.
Non-returnable. Transportation of this item is subject to hazardous materials regulation
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Size: Regulator with 12-inch Pigtails
It could not have easier to replace my regulator on my RV! I had a propane leak a few weeks ago on my RV. I did the leak test with soapy water and found the fitting where the hose attaches to the propane bottle had a leak on one of my propane tanks. I decided to just replace the hoses on both of my tanks/regulator. When I bought the 2 hoses, I decided to buy a gas leak detector to check all my other propane items (grill, griddle, etc.). Not only did I have a leak again in BOTH hoses, I had a leak on my regulator as well. I decided to buy this regulator with both hoses already attached and it works like a charm! Perfect fit! Very easy installation! The hoses seem to be good quality as well as the regulator. I think Flame King should include in this kit a small spool of yellow propane PTFE tape (everyone has the white teflon tape, but DO NOT use it for propane!!!)) to install the regulator on the main propane gas line....that was my only downside for the DIY's. Other than no PTFE tape, I'm very satisfied.
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Reviewed in the United States on December 26, 2025 by F. Smith
Size: Regulator with 12-inch Pigtails
It's been on my RV for 5 years now works great
Reviewed in the United States on July 22, 2026 by tony
Size: Regulator with 15-inch Pigtails
Worked great with out two tanks
Reviewed in the United States on July 7, 2026 by Allen Timmons
Size: Regulator with 15-inch Pigtails
Used to replace a recalled unit on my 2020 Grand Design Imagine. Easy to change out and worked great. Only worry is that the tank hoses were kinda flimsy, but we will see how they last.
Reviewed in the United States on April 22, 2026 by DWill
Size: Regulator with 12-inch Pigtails
I clipped this bad boy onto my RV setup and instantly felt like I’d leveled up my camping game. No more rushing to switch tanks mid-cook or wondering if my stove’s about to sputter out—this two-stage auto changeover keeps the propane flowing nonstop. Installation was surprisingly chill—just tighten the pigtails, hook up your tanks, and you’re ready to roll. I love how it seamlessly flips from one cylinder to the next without me lifting a finger, so my morning coffee and dinner grill-outs stay uninterrupted. The regulator’s solid brass body feels built to last, and those 12-inch hoses give me the perfect reach without kinking or fuss. Safety’s clearly a priority here, too—steady pressure means consistent flame control, and I’ve had zero leaks or weird pressure drops even on cold mornings. If you’re hitting the road and need reliable propane backup that handles the heavy lifting, this is your no-brainer pick. Trust me, it’s one less thing to worry about when you’re out chasing sunsets.
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Reviewed in the United States on June 7, 2025 by Teri McMillan
Size: Regulator with 12-inch Pigtails
Easy to install
Reviewed in the United States on May 31, 2026 by Amazon Customer
Size: Regulator with 15-inch Pigtails
I am extremely disappointed in this. We bought it last July when our RV regulator failed and started leaking propane. We installed it at the end of the season and didn't get a chance to test it out. This season when we went out to start our camping season the RV was not getting propane. After looking at the regulator the area that is supposed to change from red to clear/green was not changing no matter which tank we turned it to. Both tanks were filled that day so we knew that the tanks weren't the issue. We then had to try to track down another regulator to attempt to fix this issue which we couldn't do because of the time of day. We ended up spending the night in 40 degree weather with no heat. Once we did get a regulator the next day we ended up having to purchase one without the pigtails for the tanks, figuring we could use the ones off of the regulator purchased here. When we got the hoses off we were quite surprised by what we discovered. It appears that during the manufacture process the hoses were defective. Within both hoses the connection between the hose and the regulator was plugged. One side had an excess of red material which I'm assuming was used as sealant for the connection. The other side had a metal part blocking the opening between the hose and the regulator. This caused both feeds to the regulator to not function causing us the problem. I am quite surprised that during the quality assurance portion of the manufacture process that this was not discovered and I'm very disappointed.
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Reviewed in the United States on May 27, 2025 by ugmo288
Size: Regulator with 12-inch Pigtails
Did the job
Reviewed in the United States on July 6, 2026 by JAMES R0BERTS