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Wavin AS+
Technical Manual
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System I + II.
Fig. 10: Waste water drainage systems in Europe.
System III.
System IV.
DIN EN 12056 classifies European waste water drainage systems into four types.
System I
Single downpipes with partly-filled connection pipes.
Sanitary drainage sources are joined to partly-filled connection pipes. These partly-filled connection pipes are designed
for a filling factor (h/d) of 0.5 (50%), and are in turn connected to an individual waste water downpipe.
System II
Single downpipes with partly-filled connection pipes.
Sanitary drainage sources are joined to connection pipes of reduced size. These connection pipes are designed for a filling
factor (h/d) of 0.7 (70%), and are in turn connected to an individual waste water downpipe. This configuration is used mainly
in Scandinavian countries. It is not used in Germany.
System lll
Single downpipe system with fully-filled connection pipes.
Sanitary drainage sources, which are linked via connection pipes and operated in a fully-filled state. These filled connec-
tion pipes have a filling factor (h/d) of 1.0 (100%). Each individual connection pipe is seperately connected to the downpipe.
System III is the preferred configuration in English-speaking countries. It is not used in Germany.
System lV
System with separate waste water downpipes.
Configurations corresponding to systems I, II and III can also be divided into a waste water downpipe that collects waste
from toilets and urinals and a waste water downpipe designed to collect waste water from all other drainage sources.
This configuration is mainly used in France. Its use in Germany is only possible to a limited extent.
