| 摘要 |
PROBLEM TO BE SOLVED: To reduce the time of installation works by simultaneously carrying out plumbing and wiring works. SOLUTION: A sprinkler head having a contact mechanism outputting operation signals when the sprinkler head operates, a signal line connected to the contact mechanism, and a pipe, to the tip of which the sprinkler head is attached, are provided, the signal line is attached to the pipe, and the signal line is arranged along the pipe. A header having a plurality of connection openings is provided in a halfway point of the pipe, and the connection openings of the header and the sprinkler head are connected by a flexible synthetic resin pipe.
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