Monthly Archives: August 2012

Slow sand water filter sand source

A SUMMARY OF THIS POST: For a slow sand filter to work we need to use “graded” sand. “Graded” sand means sand that has already been processed (sifted) so that the grains of sand it contains are mostly the same … Continue reading

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water filter sand

This is an update on the post about sifting sand for a slow sand water filter. I wrote about this in response to a question from a reader. ¬†I recommended using stainless steel wire cloth to sift “play sand” so … Continue reading

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How does a slow sand water filter work?

A slow sand water filter (sometimes called a biological sand water filter) works like this: Because of the pull of gravity, water flows down through a sand bed in a container about 3 feet deep from the top to the … Continue reading

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Slow sand water filter DIY video

The new video for filter 4 is up on YouTube as of today Aug. 3, 2012. Below is a parts list: (this may have some errors and¬†omissions – occasionally, I do this documentation in a hurry in my spare time … Continue reading

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