Landscape · L-WA9D9

Air Vacuum Relief Valve

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Elements

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An air vacuum relief valve is connected to a PVC tee and PVC riser via a compression adapter, situated within a ten-inch round valve box. The assembly rests on a subgrade bed of three-quarters-inch diameter gravel forming a one-cubic-foot sump, supported by three bricks and wrapped in landscape filter fabric. The valve box is surrounded by finish grade, mulch, and perimeter laterals, with the top of the valve box positioned one inch above finish grade. The valve must be located at all high points in the system as required by the manufacturer.

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