A manual flush valve detail showing a half-inch PVC threaded ball valve housed inside a six-inch round valve box cut to a depth of six inches below the finish grade. The box rests on a two-inch layer of pea gravel with no soil inside and contains a two-foot coil of half-inch polyethylene tubing. The tubing connects to the ball valve using a half-inch male pipe thread by barb fitting. A compression adapter links the tubing down to a PVC Schedule 40 elbow socket by socket, which transitions to a rigid PVC lateral line buried twelve inches below grade.
PVC RIGID LATERAL LINE 1/2" PVC THREADED BALL VALVE 6" ROUND VALVE BOX CUT TO 6" DEEP FINISH GRADE PEA GRAVEL 2" DEEP (NO SOIL IN BOX) 2' COIL OF 1/2" POLYETHYLENE TUBING 1/2" MPT x BARB FITTING COMPRESSION ADAPTER PVC SCHEDULE 40 ELL S X S 12"
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