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Wavin AS+ Technical Manual
Allowable waste water discharge in primary-ventilated downpipes
Primary-ventilated downpipe Q
max
(l/s)
DN Standard branch pipe Branch pipe with internal radius
(swept)
60 0.5 0.7
70 1.5 2.0
80* 2.0 2.6
90 2.7 3.5
100** 4.0 5.2
125 5.8 7.6
150 9.85 12.4
200 16.0 2.0
* Minimum nominal diameter for toilets with flushing volumes of 4-6 l
** Minimum nominal diameter for toilets with flushing volumes of > 6 l
Allowable waste water discharge in secondary-ventilated downpipes
Q
max
(l/s)
Primary-ventilated Secondary ventilation Standard branch pipe Branch pipe
downpipe DN DN with internal radius
(swept)
60 50 0.7 0.9
70 50 2.0 2.6
80* 50 2.6 3.4
90 50 3.5 4.6
100** 50 5.6 7.3
125 70 12.4 10.0
150 80 14.1 18.3
200 100 21.0 27.3
* Minimum nominal diameter for toilets with flushing volumes of 4-6 l
** Minimum nominal diameter for toilets with flushing volumes of > 6 l
Table 11: Allowable waste water discharge in primary-ventilated downpipes conforming to DIN 12056-2.
Table 12 : Allowable waste water discharge in secondary-ventilated downpipes conforming to DIN 12056-2.
Downpipes with secondary ventilation conforming to DIN EN 12056-2 must be sized separately.
Configurations with secondary ventilation are used, for example, in waste water systems subjected to high loads.
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