Core TradesCâu 86 / 700
An air admittance valve (AAV) is installed to vent an island sink where a conventional vent is impractical. The AAV must be installed:
a.Below the trap weir, sealed airtight
b.Horizontally under the floor
c.Above the trap arm, in an accessible and ventilated location, at the required height
d.Outdoors at the roofline
Giải thích
An AAV is a one-way valve that admits air to break siphon action; it must be located above the horizontal trap arm (per manufacturer height), remain accessible for service, and be in a ventilated space. Placing it below the trap weir, buried, or outdoors defeats its function or accessibility.
Trích dẫn luật: 2025 CA Plumbing CodeLuyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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