See different Biosand Filter (BSF) designs and learn how to install them correctly.
For more information check out the links below: Non-standard biosand filters Minimum depth of filtration sand, underdrain gravel and separating gravel
See different Biosand Filter (BSF) designs and learn how to install them correctly.
For more information check out the links below: Non-standard biosand filters Minimum depth of filtration sand, underdrain gravel and separating gravel
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Contact usCAWST is a Canadian charity and licensed engineering firm. We address the global need for safe drinking water and sanitation by building local knowledge and skills on household solutions people can implement themselves.