Cấp nước & Phân phốiCâu 30 / 360
A pressure vacuum breaker (PVB) is selected for a landscape irrigation system. What is the minimum installation height for a PVB relative to the highest downstream head or outlet?
a.At least 6 inches above
b.At least 12 inches above
c.At the same level
d.Below the outlet is acceptable
Giải thích
A PVB must be installed at least 12 inches above the highest downstream outlet or head so the air inlet can function during back-siphonage. Six inches is the AVB minimum, and installing at or below the highest outlet defeats the vacuum-breaking action.
Trích dẫn luật: 2022 California Plumbing Code (CPC) §603.0Luyện miễn phí toàn bộ 360 câu hỏi — không cần đăng ký.
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