Core TradesCâu 185 / 700
Limiting the developed length of a fixture's trap arm (the distance from the trap to its vent) is important PRIMARILY to:
a.Prevent the trap from losing its water seal by self-siphonage
b.Increase the flow rate through the fixture
c.Reduce the amount of pipe material used
d.Allow the trap to be installed without a cleanout
Giải thích
Keeping the trap arm within its maximum length prevents self-siphonage that would pull the water seal out of the trap and let sewer gas enter. It is not primarily about saving pipe, boosting flow, or avoiding cleanouts.
Trích dẫn luật: 2025 CA Plumbing Code, Chapter 9 (Vents)Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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