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The GSF System <br /> In a typical gravity-fed septic system, after primary treatment All GSF systems are installed on a layer of clean, medium to <br /> 218 in the septic tank(ST),the effluent flows to the distribution coarse specified sand. The effluent flows into the GSF Modules <br /> w box located just before the GSF system. In level systems, the through 4" perforated plastic pipes which are secured to the <br /> 9 distribution box divides the flow equally to the rows of GSF tops of the Modules.A geotextile fabric covers the Modules and <br /> DModules. In sloped systems, called serial distribution, the distribution pipe assembly. This fabric prevents backfill materials <br /> effluent flows first to the highest row and then, by overflow and silt from entering the GSF Modules. <br /> pipes, it passes to successively lower rows of GSF Modules. <br /> Cn <br /> CD <br /> no <br /> Cr CD TRENCH SYSTEM—Straight or Curved IN-GROUND TRENCH SYSTEM <br /> m m <br /> 3 'C3 <br /> O Q_ <br /> 3 C <br /> CD <br /> CD N <br /> C- SERIAL DISTRIBUTION SYSTEM <br /> o - <br /> o MOUND SYSTEM ST <br /> m <br /> 3 O - <br /> N _ <br /> 3 <br /> N - <br /> 0. <br /> G <br /> m <br /> IV M(r <br /> N O <br /> o M SLOPED SYSTEM—In-Ground or Mound <br /> c � <br /> BED SYSTEM <br /> 7 <br />