An eight-inch diameter perforated high-density polyethylene storm drain pipe is embedded within two-inch washed gravel. The gravel bed maintains a minimum six-inch clearance on all sides and a variable cover depth beneath the finish grade. The entire gravel trench is wrapped in geotextile filter fabric with a one-foot minimum overlap at the top.
8" DIA. PERFORATED HDPE STORM DRAIN 2" WASHED GRAVEL GEOTEXTILE FILTER FABRIC 6" COVER FINISH GRADE VARIES 6" MIN. 6" MIN. 6" MIN. GEOTEXTILE FILTER FABRIC (1' MIN. OVERLAP)
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