Rudy: I don't know what that is... I will do some research on it, but if you would like to put it in your own words, that would be great.

C.M.Wolf: The one I am looking toward making is probably going to be 6-8 feet in diameter. Whatever the diameter of those tiny, blue kiddie pools they sell at WalMart is, that will be the diameter.

Ideally, it would supply 4 people with drinking water (not necessarily all water, just drinking water). If the first still doesn't provide enough, I will construct additional stills as I have materials and space available.

This is an emergency source of water... as a backup to stored water. Most likely, to be mixed with bottled water to increase the length of time that water supply will last. So, it does not necessarily have to provide all the drinking water, just some to augment the stored water, and enough for minimum survival usage encase something happens to the stored water, or we run out.