| 摘要 |
PROBLEM TO BE SOLVED: To provide a drain trap which hardly runs out of seal water. SOLUTION: An air entrapping member 30 is arranged in a bathtub wastewater inflow portion 12. The tubular air entrapping member 30 is equipped with a tube portion 32 and a flange portion 34. The flange portion 34 is equipped with a float portion 34A in which air is sealed. The float portion 34A makes the air entrapping member 30 float on water. When the water level of wastewater is higher than a bottom 12D, the air entrapping member 30 floats up to a position (protrusive position P1) where the flange portion 34 abuts on the bottom 12D. COPYRIGHT: (C)2008,JPO&INPIT
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