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Flame King

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

  • Based on 8,409 reviews
Condition: New
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Availability: 12 left in stock
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Arrives Wednesday, Sep 23
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Size: 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.

Brand: Flame King


Material: Plastic


Color: Silver


Outside Diameter: 12 inches


Item Length: 12 inches


UPC:


Manufacturer: Flame King


Number of Packs: 1


Unit Count: 1 Count


Specific Uses For Product: RV, Van, Trailer, Mobile Living Spaces


Outside Diameter: 12 inches


Item Length: 12 inches


Material Type: Plastic


Color: Silver


Brand Name: Flame King


UPC: 899003000861


Manufacturer: Flame King


Unit Count: 1 Count


Global Trade Identification Number: 61


Included Components: 2 Pigtail Hoses, Dula Tank Regulator


Item Type Name: 2-Stage Auto Changeover LP Propane Gas Regulator With Two 12 Inch Pigtails For RVs, Vans, Trailers


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Sep 23

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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Similar Products

Top Amazon Reviews

    • Excelente
Size: 12-inch Pigtails
This propane gas regulator works very well and feels sturdy and well made. Installation was straightforward, the connections fit securely, and it provides a consistent gas flow. It was a great replacement and has worked reliably. Very satisfied with the quality and performance
Reviewed in the United States on August 8, 2026 by Adrián Lechuga
    • Easy to install and works great
Size: 12-inch Pigtails
My old one quite working which was only 3 years old so I bought this one. Super easy swap out and hook up. Works great and can switch over from one tank to the other when one runs low.
Reviewed in the United States on September 9, 2026 by granidiot
    • Good for an ordinary travel trailer propane tank set up
Size: 12-inch Pigtails
My valve failed , this was a perfect solution and I didn’t have to get any new fittings or hardware. Only needed a couple of crescent wrenches and tape for the fittings. 15 minutes and fixed my Travel Trailer for a nice week of camping
Reviewed in the United States on September 4, 2026 by Philip W. Jacobs
    • So far, so good.
Size: 12-inch Pigtails
This is my second propane regulator replacement. Very disappointed that the original and the first "Samplife" brand replacement both leaked. Read the reviews. Don't buy the regulator with gauges on the hoses. They WILL leak. As far as this regulator goes, the plastic connectors to the propane tanks look/feel cheaply made. They look like they could break easily and if you look at the reviews, this seems to be confirmed. I do have replacement hoses if needed, but I kind of wish I had just bought the Camco brand. Hope this one goes the distance. I will update if I have issues. ... show more
Reviewed in the United States on December 12, 2025 by Crawdad
    • Left side leaked
Size: 12-inch Pigtails
First one had a leak, it was past warranty date, I explained to seller that I used right side first, then left side approximately 40 days later and it leaked, seller sent me another one and it works great. Thank you Seller
Reviewed in the United States on March 25, 2026 by SaturnStar
    • Total Peace of Mind – Should’ve Bought This Sooner
Size: 18-inch Pigtails
I can honestly say this regulator made my propane setup stress-free. Before installing it, I was constantly worried about running out of gas at the worst possible time. Now, the automatic changeover does the work for me. It switches tanks seamlessly, and I don’t even have to think about it. The build quality feels solid and dependable — not flimsy at all. The two 18-inch hoses are sturdy and were the perfect length for my setup. Installation was simple and straightforward, and once it was hooked up, everything just worked exactly the way it should. Gas flow is steady and consistent, and I’ve had zero issues. It’s one of those products you don’t really notice after installation — and that’s a good thing. It just quietly does its job. If you rely on propane and want reliability and convenience, this is absolutely worth it. I should have upgraded sooner. ... show more
Reviewed in the United States on February 15, 2026 by John Aseph
    • Absolute crap don't purchase
Size: 12-inch Pigtails
If I could give it one star I would don't buy this crap both of the plastic parts where it screws to the tank broke while I was not home gas leaked out become a fire hazard could have blew up my camper and if it would out of stewed the crap out of this company no they were not over Titan I'm 63 I don't think I could over tighten them with one hand. These are completely dangerous do not purchase them you may come back to your camper burnt to the ground see my camper is a fifth wheel with an inside of a compartment. Come home to empty gas tanks and could have called the fire and burnt my whole RV down don't purchase save yourself some trouble buy them with the old style connectors this plastic crap from China ain't worth having ... show more
Reviewed in the United States on July 8, 2026 by jeffery herndon
    • Direct OEM Replacement
Size: 12-inch Pigtails
Easy install and worked as intended replacing my 10 year OEM valve.
Reviewed in the United States on July 29, 2026 by Amazon Customer

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