How to make a simple water filter?

[kaleidoscope]

I was wondering if any of you have a very simple way to make a water filter using buckets. I'm going to Africa next september and will be visitng a secondary school for a week and just thought it would be nice to teach the kids how to make a water filter.

 

[Mech_Engineer]

What are you hoping to remove from the water using a filter? Rocks can be removed using a simple wire screen; removing pathogens would require pressurized filter mediums with very tiny holes in them (about 0.4 um).

http://adventure.howstuffworks.com/outdoor-activities/hiking/water-filter.htm

 

[Greg Bernhardt]

It can be as simple as filtering water through some piece of cloth or through a bucket of sand.

 

[thisnow]

i heard somewhere that if you fold a piece of clothe over seven times (or use seven layers of clothe) that it can be used as a simple water filter. Google it. : )

 

[patriciathore]

In my own opinion, i think you can put some gravel, sand, cotton, and even charcoal. Just as simply as that! :)

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http://www.swimmingpoolsetc.com/poolfilters.htm​