| 摘要 |
The drainage pipe (24) issues in connection with the outer wall (22) of the well. There is a further lateral inlet pipe (32) communicating with the stand pipe (18). This inlet pipe (32), which has a water lock separate to the drainage pipe (24), issues in connection with the well lower part. The second lateral inlet pipe pref. has a first pipe piece with partly a first part (36) running sideways from the well. A second upwardly directed part (38) is connectable via a coupling component (40) to at least one further pipe piece (42). |
