| 摘要 |
PROBLEM TO BE SOLVED: To enable an inhabitant to easily clean a drain pipe to spread disposer drainage by solving the problem that the drain pipe has been cleaned by special traders heretofore, resulting in the difficulty of coping with disposer drainage requiring frequent cleaning. SOLUTION: A cleaning hole 6 is provided on the opposite side or in the other region to a horizontal branch pipe socket 5 for connecting a horizontal branch pipe, and the cleaning hole 6 can be blocked up by screwing a plug 7 into a female screw part 6b formed on the inner peripheral side, and when the plug 7 is detached, it is suspended by a suspending member 8.
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