Flame King Auto Regulator with Pls Cover & Long Mount Bracket & 2-12″ Pigtails


  • Allows removal of empty cylinder for refill without interrupting propane supply
  • For RVs with dual propane tanks; automatically switches from primary to reserve tank when primary is empty
  • Pairs well with our 48 Inch Thermo Plastic Hose, item 100383-48
  • Double stage design maintains constant gas pressure under changing demand and conditions
  • Inlets are 1/4″ SAE inverted flare and outlet is 3/8″ NPT female pipe thread
  • Rated for 190, 000 BTU
  • Regulator & 2 x 12″ pigtails
Out of stock
SKU: KT12ACR6N/AAvailability : In StockIn StockOut of stock

Please read below instructions or watch our video Below


  1. Turn the Lever towards a tank.
  2. If there is propane in the tank, the indicator will go clear.
  3. Propane will begin to flow from this tank ONLY through the regulator and to the appliances.
  4. When the tank runs out of propane, the indicator will show RED and the regulator will automatically switch over to pulling propane from the other tank.
  5. Rotate the lever to the other side and the indicator will go clear again.
  6. This will allow you to remove the empty tank and get it refilled.
  7. Propane will flow from the second one while you get the first one refilled.


Flame KIng 2 Stage Changeover Regulator


Weight: 2.6 lb
Dimensions: 7 x 4 x 4 inches
Regulator is factory set at 11wc (water column)

Click HERE for the Product Manual

Customer Reviews

Based on 436 reviews
charlie h.
Works great

Great value

Glenn Archer
Plastic nut cracked

My photo looks like a few others in the reviews, the plastic nut cracked. Only made it for 8 months. I also had some difficulty swapping tanks using the switch but it's the first time I used that feature so I may have done something wrong, though it seems like a simple thing...

Robert Craig

It fixed the problem on my propane tanks

Oscar cervantes
Great price

I bought this to replace the original one from my travel trailer since it was leaking .works great. Good price in comparison to others in the market.

Ashley Mattox
Does what it needs to

This works well and does what it needs to for our two tank propane in our trailer. The only thing we wish it had was a gauge to show us how much propane each tank has left. Our previous one showed that and this one doesn’t. We will have to buy another item to know but overall gets the job done.

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