A few years ago I came across a great find at a yard sale my neighbor was having. I found and bought (for a pittance), a small kitchen counter, water distillation apparatus. This device is enclosed in a stainless steel housing and appeared to be missing a few parts. The space it takes is roughly one cubic foot.
With a little work I managed to clean it up and set it up for a trial run. It has a mechanical timer and limited capacity, but when I ran it using some water from my kitchen RO system (~5-50 ppm of dissolved solids, as opposed to ~300-500 ppm tap water), the water dispensed from the device was reading zero ppm dissolved solids!
The distiller isn't super efficient, running off an electric heating coil, but when I calculated the actual cost of operation including my electricity rates, I can make distilled water for half of what buying it from the grocery store would cost, and even less if I set it up and run it on my soon-to-be-installed off-grid solar power system.
I have the distiller stored on a shelf at the moment, but when I get going on my electrochemical research in earnest, it may play a part in keeping me well stocked with lower cost distilled water.
Edited by WSM, 04 November 2018 - 10:09 AM.