Drainage unit with at least one perforated drainage pipe comprises at least one further drainage pipe with different perforations, or at least one conductor pipe without perforations

摘要

The drainage unit (1) with at least one perforated drainage pipe (6) comprises at least one further drainage pipe (6) with different perforations, or at least one conductor pipe (8) without perforations. The pipes (6, 8) with an external screw thread (7) are joined to one another by means of coupling nuts (9) with an internal screw thread. An independent claim is also included for an application of the proposed drainage unit, in particular, for drainage of sloping ground layers.