permaculture

[Greg <FarmerGreg@UrbanFarm.org>]

From the example below I have found that using sand over the long 
haul clogs and that pea gravel works better because of the clog 
factor.  Also you can plant reeds in tier two for uptake of heavy 
metals and such.

Greg

> i have not started to try it, yet, but i've read about (and had
> second-hand accounts of) a 3+ tier grey water filtering system.
>
> tier 1 is simply a container to stop splash errosion. the water pipes into
> the box, hits the wall and then goes out the next pipe.
>
> tier 2 is a sand filter. the grey water pipes into the bottom of the
> container. the meeting place of the pipe and the container has a fine wire
> mesh to keep out clogs. the container is partially filled with sand. the
> out-pipe is located at the top of the container. the sand filters out
> solids. tier 1 must be above the out-pipe of tier two, for gravity's sake.
>
> the third tier is a large bathtub. the pipe enters one side (again, with a
> filter) and fills the tub. the tub is filled with gravell and water-garden
> plants. you want to choose plants to filter out the things that you
> believe to be in your water.
>
>
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Greg Peterson
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