Video

Demold and Check Wet and Dry Concrete Mix Filters Video

Part of a video series on how to build a biosand filter (BSF). Learn how to remove the concrete filter from the steel mold when the concrete mixtures used to pour the filters were too wet or too dry. Check the quality and see if the filters meet the standards.

  • 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.