Quote:
Originally Posted by Dradus
If the butane worked without introducing pressure or vacuum then maybe thats what I'll eventually try, I'd just make sure to seal it properly.
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The problem was the clear tubing he was using was permeable to the butane. But it looked cooler than something that wouldn't leak, like copper pipe. Butane is the stuff in lighters (you can get bulk-refill canisters), and it's under pressure, but not a lot... about 30 psi at room temp. It's probably the lowest pressure you could get without having to support a vacuum, as air in the heat pipe will keep it from working well.