An auto flush valve is housed within a ten-inch round valve box set into the finish grade and mulch layer. The box rests on three bricks above a three-quarter-inch diameter gravel sump containing one cubic foot of gravel within the subgrade. Landscape filter fabric lines the excavation around the sump and lower box. Schedule 80 PVC piping connects to the auto flush valve and extends to a PVC exhaust header or Techline RW lateral with required fittings. The valve is located per the Techline RW layout details and at system low points.
10" ROUND VALVE BOX PER SPECIFICATIONS AUTO FLUSH VALVE MULCH PER SPECIFICATIONS FINISH GRADE LANDSCAPE FILTER FABRIC SCHEDULE 80 PVC (TYP.) PVC EXHAUST HEADER OR TECHLINE RW LATERAL PER DETAIL, WITH FITTINGS AS REQ'D BRICK, 3 REQ'D SUBGRADE 3/4" DIAMETER GRAVEL SUMP (1 CUBIC FOOT) 4" 1" NOTE: 1. LOCATE AUTO FLUSH VALVES AS SHOWN ON TECHLINE RW LAYOUT DETAILS, AND AT LOW POINTS AS REQ'D BY MANUFACTURER.
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