| 摘要 |
PROBLEM TO BE SOLVED: To provide a loop piping type sprinkler piping installation in which piping for terminal test valves required for a water supply test can be executed at a low cost. SOLUTION: An on-off valve 10 for maintenance, which regulates the flow direction of water supply from a water supply pipe 5 at the time of closing a valve so as to be in one direction within the loop piping, is formed in the nearby section of the proximal end part 4 of loop piping 1, one end of the piping 7b for the terminal test valves is connected to a branch pipe 2b for sprinkler heads in the lower most stream position or the nearby position within the loop piping at the time of closing the on-off valve 10 for the maintenance, a terminal test valve gear 8 is connected to the other end of this piping 7b for the terminal test valves, and the drain section 8a of this terminal test valve gear 8 is connected to a drain pipe 9. COPYRIGHT: (C)2007,JPO&INPIT
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