| 摘要 |
PROBLEM TO BE SOLVED: To overcome a problem such that drainage sometimes flows into another horizontal branch pipe over a vertical drainpipe, when the drainage is discharged into the vertical drain pipe from drainage equipment via a horizontal branch pipe, in a drain pipe system which is connected to the vertical drain pipe by the horizontal branch pipe arranged from the drainage equipment, provided on a floor, via an underfloor level. SOLUTION: In this drain pipe system, horizontal bent parts 10 and 12 are provided in the horizontal branch pipe 5, so that a flow velocity of a drainage flow can be decreased in the bent parts 10 and 12, and so that the force of water can be abated. Thus, the drainage is prevented from flowing into another horizontal branch pipe 8 over the vertical drain pipe 6.
|
