Plumbing · I-G9QZ2

Backflow Assembly

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A backflow prevention assembly is mounted on a concrete slab foundation that is a minimum of 4 inches thick and extends at least 6 inches past the piping and enclosure on all sides. The irrigation service line from the meter connects via PVC Schedule 80 stainless steel couplers and nipples to a concrete thrust block, transitioning upward through brass risers, unions, and a wye strainer. The assembly incorporates a backflow device enclosed within a protective housing, a pressure regulator, and brass ball valves. A clearance of 12 inches minimum is maintained beneath the backflow device, with a 6-inch minimum distance above the concrete slab. The piping exits through brass elbows and PVC Schedule 80 adapters to the irrigation mainline.

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