| 摘要 |
PROBLEM TO BE SOLVED: To provide a water supply piping system which can send water for a given period without using electric power even if the inside pressure of a pipe is lowered in a direct water supply system. SOLUTION: The water supply piping system supplies water by pump pressure directly to a water supply outlet through a water pipeline. At least part of the water pipeline has rigid outer jacket materials 11 and 21 covering the outside of the pipeline, flexible inside materials 12 and 22 covering the inside of the pipeline, and diameter reducing means 12, 13, and 22 which causes the flexible inside materials to deform inwardly in correspondence to the pressure to reduce the inner diameter of the pipeline when the pump pressure is lowered or reaches zero. COPYRIGHT: (C)2011,JPO&INPIT
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