Learn step by step how to correctly install a concrete BSF filter with layers of gravel and sand and how to check the flowrate. Learn tips to make filter installation efficient.
Learn step by step how to correctly install a concrete BSF filter with layers of gravel and sand and how to check the flowrate. Learn tips to make filter installation efficient.
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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.