Video

Demolding the Filter Video

Part of a video series on how to build a biosand filter (BSF). Learn step by step how to remove a concrete biosand filter (BSF) from a steel mold. Learn tips to make demolding the filter easier and to prevent damage or cracks.

  • Language:

    English

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About CAWST

CAWST 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.