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Old 02-11-2010, 04:26 PM
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StainlessSteelCynic StainlessSteelCynic is offline
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Join Date: Feb 2009
Location: Western Australia
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As I recall (it was some time ago) here in Australia we used to get issued a special cloth sack that was used to filter water. It wasn't exactly a rectangle as one side at the bottom was angled so water could drip into a collection container. I think it was called a Millbank Filter or something similar.
Anyway, the point was to fill the bottom with a layer of charcoal, above that a layer of sand and above that a layer of pebbles. Then you'd pour the suspect water into the top of the bag and let it filter through.
Obviously this was for survival situations as you couldn't carry the thing around while it was filtering
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