There is however a butane adapter being sold that can be really DANGEROUS if you don't know what you're doing.
I've seen a few different colors, but most are black and look something like the below.
|A butane adapter -- POTENTIALLY DANGEROUS|
|A cheap 100% butane canister of the type frequently used in restaurants for table side cooking|
|The lug on this adapter can be seen near the top of the photo.|
|A butane canister (left) has a notch that the lug on the adapter (right) fits into|
|A butane adapter attached to the valve on the end of a backpacking stove's fuel hose.|
|A butane canister mated to a backpacking stove via a butane adapter.|
OK, we're all hooked up. Let's fire it up.
|A backpacking stove running off of a cheap 100% butane canister|
I'll tell you what the problem is. Remember in the photo above how I said that the lug needs to point at the sky? What prevents the canister from rolling over? NOTHING. That's right. There is absolutely nothing that prevents that canister from rolling or turning in some fashion. And what happens if the canister rolls?
|The stove flares up uncontrollably if the canister rolls over.|
Why does it flare? There's a fixed position plastic tube inside the canister. The plastic tube points up, up toward that notch you saw in the collar of the canister. The plastic tube is designed to suck vapor -- which it does quite well so long as the canister is oriented with the notch up. But recall that the majority of the fuel in a canister is in liquid form. If the canister rolls a bit, then suddenly the tube is plunged below the surface of the liquid, and liquid fuel is squirted into the burner. Whoomph! A flare erupts.
|A butane canister valve assembly. The notch should always face UP.|
What's that? If your stove has a pre-heat loop, wouldn't it be OK? Well, yes, but you'd better make sure the canister doesn't roll until the stove is warmed up. Yes, you could use this type of canister in side laying mode on a stove with a pre heat mechanism -- if you were careful. So be careful.
I believe this type of adapter is safe if the canister is standing up. I strongly recommend that you use something like a Brunton Can Stand like the one shown in the photo below to stabilize the canister. If the canister were to fall over, a dangerous, uncontrolled flare would result.
|A butane canister, upright, stabilized by a Brunton Can Stand|
Thank you for joining me on another Adventure in Stoving.
1. The adapter is well made, but it's too easy for the canister to roll accidentally which could cause a serious flare. Therefore, this adapter is generally not recommended.
2. Never use this adapter with a side laying canister on a stove without a preheat mechanism (generator).
3. If you are cautious, you could use this adapter on a stove with a preheat mechanism (generator), but be aware that it's very easy for this type of canister to go into liquid feed mode accidentally which could trigger a flare if your stove hasn't warmed up yet.
4. This adapter is safe if the canister is used in the fully upright position, so long as the canister doesn't fall over. I strongly recommend that you use some means to prevent the canister from tipping over.