Rainwater downpipes or downpipes are internal or external vertical pipes that are installed to drain rainwater from roof surfaces, balconies or loggias.
In addition to sufficient dimensioning, care must be taken to ensure that when the wastewater enters the downpipe, it is mixed with air. In this case, a corresponding overpressure only builds up in the area of the warps or existing drainage pipes, which can usually be the cause of disturbances if not installed properly, such as emptying or pushing out the sealing water from odour traps or flushing into pipes.
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