Drainage, Waste & VentCâu 8 / 120
Which trap arrangement is expressly prohibited because it will siphon its own seal?
a.An S-trap
b.A P-trap vented within the permitted trap arm length
c.A drum trap serving a specialty fixture where approved
d.A deep seal trap on a floor drain
Giải thích
An S-trap discharges vertically downward with no vent break, so the falling column of water pulls the seal out of the trap and is prohibited. A properly vented P-trap is the standard approved arrangement, and drum traps and deep seal traps remain permitted in specific approved applications.
Trích dẫn luật: IPC §1002.1Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A fixture drain serving a lavatory is 1-1/2 in in diameter. What is the smallest vent size that may serve it?
- A horizontal building drain changes direction with a fitting that turns the flow 90 degrees. What does the code require at that point?
- A 2 in trap arm serves a floor-mounted fixture. The trap weir is at elevation 0. What is the greatest amount the trap arm may fall before it reaches the vent connection?
- A 3 in horizontal drain is run 72 ft at 1/8 in per ft. The invert at the upstream end is at elevation 100.00 ft. What is the invert elevation at the downstream end?
- A vent terminal passes through a roof that is used only for weather protection in an area with no snow-depth requirement. What is the minimum height the vent must extend above the roof surface?
- A vent terminal must be located away from an openable window. Which arrangement satisfies the code?
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