| 摘要 |
The present invention relates to a wall drainage system which prevents unpleasant noise generated when sewage is discharged in a rest room from being transmitted to a lower floor. The sewage discharged from a toilet, a washstand, a bathtub, and a trench flows into a connection device and is discharged to a standpipe while flowing along a drainpipe located on a shelf type auxiliary wall. therefore, the wall drainage system prevents the unpleasant noise generated when the sewage is discharged from being transmitted to the lower floor so that the wall drainage system creates pleasant indoor environment and prevents the noise transmitted though a floor. |
