Rooftop Catchment

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Revision as of 04:02, 24 February 2012 by Marcin (talk | contribs) (Created page with "*Get cheapest washed gravel - small works better *Porosity of pea gravel is .65 *Gallon/day/person - 15 gal/day bath-cooking-water-animals *3-1 long to wide *2x depth away from h...")
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  • Get cheapest washed gravel - small works better
  • Porosity of pea gravel is .65
  • Gallon/day/person - 15 gal/day bath-cooking-water-animals
  • 3-1 long to wide
  • 2x depth away from house
  • Go down to 1 micron
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