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sp332
on July 17, 2013
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Lifehacks from 100 Years Ago
These are cool, but isn't the water filter backwards?
zeckalpha
on July 17, 2013
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By going in this order, the sand does not go into the output.
voidlogic
on July 17, 2013
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This, if you had a big enough filter you would both start and end with the large rocks and have the fine sand in the middle.
Zikes
on July 17, 2013
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A bit of cloth at the bottom could help with that.
neurostimulant
on July 17, 2013
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It's the trusty old rapid sand filter.
http://www.who.int/water_sanitation_health/hygiene/emergenci...
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