An air and vacuum relief valve connects to a 180-degree two-way adapter tee linked to the dripline. The assembly sits inside a six-inch round valve box set upon three brick supports. A pea gravel sump measuring a minimum of one cubic foot is positioned directly below the valve box at finish grade. A three-quarter-inch male by one-half-inch female reduction bushing transitions the connection.
REDUCTION BUSHING DRIPLINE 3/4"M X 1/2"F FINISH GRADE 180-DEGREE 2-WAY ADAPTER TEE RELIEF VALVE AIR/VACUUM VALVE BOX 6" ROUND BRICK SUPPORTS (THREE) PEA GRAVEL SUMP (MIN. 1 CUBIC FOOT)
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