| 摘要 |
PROBLEM TO BE SOLVED: To smoothly perform drainage by suppressing a clogging of a foreign matter inflow prevention member while suppressing inflow of foreign matter into a drain pipe.SOLUTION: A drain trap 20 includes: a seal water channel part 22 in which seal water is stored; a high water level channel part 30 that continues from a downstream end of the seal water channel part 22 and that forms a drain channel to a downstream side from a maximum water level arrival part 32P for the seal water; and a foreign matter inflow prevention member 40 that is arranged in a section from a lowermost part 26B of the seal water channel part 22 to the maximum water level arrival part 32P of the high water level channel part 30 and that is attached in such a manner that an upstream-side surface is directed downward. |
