Top 10 for Chimney Filter/Drain Systems (PowerPoint Slides)
Top 10 for Chimney Filter/Drain Systems (PowerPoint Slides)
Top 10 for Chimney Filter/Drain Systems (PowerPoint Slides)
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#1 – Be cautious in consideringnatural soils <strong>for</strong> filtersRare to find natural soils suitable<strong>for</strong> filters‣Not “clean” enough‣Can be gap graded‣Variable gradationsReadily available ASTM C33 fineaggregate is an excellent filter inalmost all cases