| 摘要 |
PROBLEM TO BE SOLVED: To provide a piping system for water supply, which can be drained easily. SOLUTION: A water diverting board, in which the start end sections of water diverting pipes having flexibility piped to water usage instruments in a living space respectively are collected and converged at one place and a header as a converging section is formed, is installed near a ceiling section on the indoor side, a water supply pipe is connected to the header while the terminal discharge openings of the water diverting pipes branched and piped from the header are connected to a coupling board freely coupled with water- supply hoses for the water usage instruments, and an air feed valve for drainage is mounted between the header and the coupling section of the coupling board in a freely openable and closeable manner.
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