| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly-functional drainage system which can be installed mainly in a narrower space and has higher drainage performance (conveying performance).SOLUTION: Drainage piping 21 is connected between drainage equipment and a catch basin or a vertical drainage pipe. The drainage piping 21 is provided with a clogging prevention mechanism 24 which is capable of preventing negative pressure from being generated at an upstream side of a clogged portion when an inside of the drainage piping 21 is partially clogged by drainage water 22. |
