Monthly Archives: March 2012

Slow sand filter storage container: More info on Filter 4

The water clarity of the output from filter 4 has been getting worse and worse up until 2 days ago. An air vent on the top of the barrel was added after I noticed the output pulsing while the pump … Continue reading

Posted in slow sand water filter study and construction | 2 Comments

Flow rate record for filter 4

When the filter was first set up the flow rate was too fast, a regulator valve was added. .25mm sand on the top 4 inches;  .45 mm sand bottom; pea gravel bottom 4 inches;  carbon granule filter on output;  3 … Continue reading

Posted in slow sand water filter study and construction | Comments Off on Flow rate record for filter 4

Rain barrels and roof water harvesting

I must say a word about rainwater harvesting and rain barrels in general. Rainwater harvesting and rain barrels in general are very good ideas.  The un-purified water from a rain barrel is still quite useful for all kinds of things … Continue reading

Posted in Uncategorized | Comments Off on Rain barrels and roof water harvesting

Observations of filter 4 (what has been learned)

Compared to the other filters I have put together, this one is slightly different. The majority of the sand is .45 mm effective size. This filter appears to be more subject to variations in the input water quality. Heavy rain … Continue reading

Posted in slow sand water filter study and construction | Comments Off on Observations of filter 4 (what has been learned)