There are typically two things you can do with a pressure cooker still – distill alcohol and make moonshine etc, or to purify unclean or salty water to make it safe for drinking. The purpose of this post it to focus on the latter!
When used to purify salty sea water, once heat is applied, water vapour is produced, the water vapor escapes and condenses in the copper pipe, before running out into the bucket. The salt is left behind in the pressure cooker, with the water in the bucket now being salt free, and safe to drink.
Basically the tutorial below demonstrates that several meters of copper tubing, a 5 gallon bucket and a pressure cooker equals a fully functioning pressure cooker still. If you live by the coast or an unclean water source, build one of these and you’ll always have emergency water for you and your family to drink. This method could also be adapted to work outdoors over a campfire or portable gas camp stove.
If you are prepping for a SHTF total collapse, building a simple pressure cooker still like this makes a lot of sense. It provides a method to purify all water sources and it gives you the means to distill alcohol, which can be used for consumption, medical use and bartering.