| 摘要 |
PROBLEM TO BE SOLVED: To provide a level fluctuation preventing structure suppressing the fluctuation of the sealing water level of a drain trap caused by atmospheric pressure fluctuation generated in a drain pipeline of a bathroom or the like. SOLUTION: An air pressure regulating means 8 having air reservoirs 8a, 8b for taking air in and out according to air pressure fluctuation applied to the drain pipeline 4 is provided in the drain pipeline 4 of the bathroom provided with the drain trap 10, to suppress the level fluctuation of sealing water A stored in the drain trap 10. COPYRIGHT: (C)2007,JPO&INPIT
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