I've built and used several aluminum pressure cookers in the 5-gallon range (and still have a couple, only one of which is set up as a still) with very good luck and no off flavors for decades. Admittedly, I use my 16.5-gallon keg-based still whenever I can, but that 5-gallon job is still handy for small runs.
I put a lot of add stuff in my stills, like pomace and false bottoms for grappa and even the occasional on-the-grain wash, so I really appreciate being able to open that big hole in the top.
If the aluminum is sturdy, and pressure cookers are, aluminum is not a bad choice.
Zymurgy Bob, a simple potstiller Making Fine Spirits
--- In email@example.com, M L <kekedog13@...> wrote:
> And I didn't buy the NICEÂ heavy duty 24 QT. pressure cooker that was on sale before Christmas at Atwoods because it WAS aluminum. Boy would it make a nice brew pot/ still pot. Any ways education and information is everywhere if you just look for it.ML.
> --- On Mon, 1/9/12, M L kekedog13@... wrote: