Explosions
Several scenarios could cause alcohol vapor to combust during the operation of a still. 1. The still could get clogged up, and with enough heat and pressure it's possible that it could explode.
Are stills safe?
Stills made from old radiators, sheetmetal, plastic barrels and other such materials are questionable at best and extremely dangerous at worst. Always insist on using stills that are made from pure copper or 304 stainless steel.
How flammable is moonshine?
The distilling process itself produces alcohol vapors, which are highly flammable. ... In terms of consuming the liquid, if the final product is over 100 proof, the moonshine itself is also extremely flammable and can be very dangerous.
