Fixtures & Water HeatersCâu 67 / 120
A temperature and pressure relief valve has a 3/4 inch outlet. Which discharge piping arrangement is acceptable?
a.1/2 inch copper reduced at the valve and terminating 30 inches above the floor
b.3/4 inch pipe running by gravity to terminate 8 inches above the floor with a plain end
c.3/4 inch pipe with a ball valve installed for service isolation
d.3/4 inch pipe with a threaded cap installed on the terminal end
Giải thích
Discharge piping must be full size of the valve outlet with no reduction, must drain by gravity, must have no valve in the line, and must terminate between 6 and 24 inches above the ground or an approved receptor with no threads on the end. The 1/2 inch option reduces the pipe and terminates too high, the ball valve option installs a prohibited shutoff, and the threaded cap option both threads the end and blocks discharge entirely.
Trích dẫn luật: IPC §504.6Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
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