QUOTE (LTSR @ 2 Dec 2009, 18:12)
<{POST_SNAPBACK}>De-frost your freezer and collect the water that'll be as pure as you can easily get. If you need a lot volunteer to do your neighbours!
For a regular supply get a small freezer and drill some holes top and bottom through the door to promote air circulation, if you were to remove the door entirely you would loose too much of the insulation.
Incidentally if water vapour is a problem when spray-painting then a coil of tubing placed inside the freezer will condense a large part of the water out. The intake would naturally need to be outside and the delivery end fed to the compressor; you would also need to provide a water trap before the compressor.
"Easily" is the key word, maybe. But a good idea, also! I suspect the ice formed within freezers consists of water formerly contained in the air surrounding the box, which enters when the door is opened, remains trapped, and it's water vapor "plates out" as ice within the cabinet. As such, it will contain minute amounts of foreign matter, I believe primarily dust particles, which are found clinging to vapor droplets in the air.
Or, I might just not know what I'm talking about! Recall reading though, that each raindrop contains dust.
imp