An air and vacuum relief valve connects to dripline or blank tubing via a threaded tee fitting inside a 6-inch round valve box. Three brick supports rest beneath the assembly over a 6-inch deep pea gravel sump. The top of the valve box sits 1 inch above finished grade. The air and vacuum relief valve cannot be connected lower than the dripline laterals.
1" 6" ROUND VALVE BOX TORO DL2000 AIR/VACUUM RELIEF VALVE (YD-500-34) TORO LOC-EZE X 1/2" FPT TEE (FTF16) TORO DL2000 DRIPLINE OR BLANK TUBING BRICK SUPPORTS (3) PEA GRAVEL SUMP (6'' DEEP) NOTE: AIR/VACUUM RELIEF VALVE CANNOT BE CONNECTED LOWER THAN DRIPLINE LATERALS. FINISHED GRADE
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