| 摘要 |
PROBLEM TO BE SOLVED: To easily conduct cleaning work, and prevent choking. SOLUTION: For a drain header 20, one end is connected to a drain main pipe 5, and plural branch pipes 26A-26D are connected to a main body 23. At the other end of the main body 23, an upwardly opened cleaning port 30 is formed, and a cover is detachably provided on the cleaning port 30, so the cover can be detached in cleaning for enabling working on the floor. The main body 23 is downwardly inclined toward the drain main pipe 5 at a specified gradientα(1/50 or more) to be connected.
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