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Flame King

Flame King (KT12ACR-2a) 2-Stage Auto Changeover LP Propane Gas Regulator With Two 12 Inch Pigtails For RVs, Vans, Trailers

  • Based on 5,686 reviews
Condition: New
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Availability: 12 left in stock
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Arrives Monday, Jun 15
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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: Monday, Jun 15

This item is non-returnable:

Non-returnable. Transportation of this item is subject to hazardous materials regulation

View our full returns policy here.

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Top Amazon Reviews

    • Easy peasy replacement
Size: Regulator with 12-inch Pigtails
Review Image by F. Smith
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. ... show more
Reviewed in the United States on December 26, 2025 by F. Smith
    • Easy install
Size: Regulator with 12-inch Pigtails
Worked well. Easy installment. Good quality.
Reviewed in the United States on April 16, 2026 by Amazon Customer
    • Great quality
Size: Regulator with 12-inch Pigtails
Installed and works perfect. Recomended...
Reviewed in the United States on April 30, 2026 by Jorge
    • Works great.
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
    • Junk
Size: Regulator with 12-inch Pigtails
Junk leaks out of both connection three both gauges
Reviewed in the United States on February 6, 2026 by Read delivery instructions
    • Easy
Size: Regulator with 12-inch Pigtails
Very easy to change out with the old one that quit working.
Reviewed in the United States on March 22, 2026 by Michael F.
    • Our RV could have Exploded!!
Size: Regulator with 15-inch Pigtails
Review Image by Jesus de la Garza
Review Image by Jesus de la Garza
It lasted us 2 months. Came back home and it flood the house with propane smell. I got home, wife said she felt sleepy, went outside to hear hissing, the green part of the hose that screws onto the tank cracked, causing a leak of propane. Thanks to God wife didn’t turn any spark on, or things could've ended badly! I would not recommend if you’re using this with a 100lb tank. If there was any little spark our RV could have exploded and who knows what else. I figured with good reviews I could trust it, but not anymore. I’m just so glad I was able to catch this on time before anything happened. ... show more
Reviewed in the United States on February 27, 2026 by Jesus de la Garza
    • regulator
Size: Regulator with 12-inch Pigtails
fixed the problem
Reviewed in the United States on April 28, 2026 by cds0103

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