A standard valve box rests on four 6-inch concrete masonry units measuring 6 inches by 8 inches by 16 inches, with one block placed under each side. Clustered valve boxes may share a concrete masonry unit block.
STANDARD VALVE BOX 6" CMU (6"x8"x16") NOTES: 1. VALVE BOX TO REST ON (4) CMU BLOCKS (ONE FOR EACH SIDE). 2. CLUSTERED VALVE BOXES MAY SHARE A CMU BLOCK.
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