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Emergency water storage - How much water do I need to store? What containers should I use for water storage? How can I filter/purify water in an emergency?
Clapp's Home-Made Water Filter. this filter is composed of the simplest materials - sand and charcoal. The filter is arranged from a 50-gallon wine cask with a false bottom, perforated; on this a layer of gravel, then alternate layers of charcoal and white, clean sand, and top layer of excelsior, with perforated cover ten inches from the top, and a discharge-pipe or over-flow four inches from the top.