Landscape · L-TYXZM

Irrigation Valve Box Assembly and Piping Detail

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An irrigation valve box is set into the finish grade over a five-inch minimum depth of three-quarter-inch washed gravel bed and weed barrier fabric, with brick supports elevating the lateral pipe. The assembly connects a polyvinyl chloride schedule 40 main line through a schedule 80 tee, elbow, action unions on both sides, and couplers to a brass automatic valve. A two-wire control system utilizes a decoder fastened to the box with a bracket, waterproof wire connectors type 3M DBR/Y-6, innerduct pest duct conduit swept into the valve box with waterproof foam sealant, and a grounding wire installed per the manufacturer's recommendation. A valve ID tag is attached, and a three-inch minimum clearance is maintained between the gravel bed and the valve.

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