Monthly Archives: December 2012

Rainwater harvesting in Washington state

Slow sand filters are totally sustainable, will work on gravity feed only, take out hydrocarbons, bacteria, viruses, and do not require addeed chemicals to operate. Check out the websites below. And check out the post just before this one if … Continue reading

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Slow sand filter field test (filter 5)

Filter 5, the most recent filter set up here in May of this year is now working. ┬áThe drainpipes inside the filter at the bottom of the barrel are covered by 4 inches of pea gravel. The sand directly on … Continue reading

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