46
Alternative stack ventilation system
Geberit Drainage Systems
6.1
Geberit Sovent overview
6
Alternate stack ventilation system
6.1.1
Geberit Sovent – Planning
System description
Sovent, a fitting for single stack drainage systems,
substantially increases the performance of a soil and
waste drainage system, and thus eliminates the need
for a separate vent stack and reduces the diameter of
stacks in high rise buildings.
Due to its high capacity and excellent performance, the
Geberit Sovent fitting is an ideal drainage solution for:
• High rise buildings.
• Hotels.
• Laboratories.
• Industrial plants.
The Geberit Sovent becomes extremely cost-effective in
buildings higher than 5 storeys.
Function
The specially designed branch inlet fitting reduces the
pneumatic pressure fluctuations in stacks, preventing
the siphonage of traps. The opening to the stack is one
of the key characteristics of the fitting as it allows the
branches to be ventilated. Together with the free air
circulation in the stack, the opening smoothes the water
flow in the connected branches.
When a Geberit Sovent system is planned, the
following points have to be observed in addition to the
general rules for waste and drainage stack design:
• Use of a Sovent fitting instead of a common
branch fitting.
• Pressure relief ventilation at the base of the stack.
• Every stack has to be ventilated through the roof
with the same diameter.
Connection load per floor
The branches have been designed in accordance with
the local regulations (e.g. EN 12056-2), which include the
dimensioning diameter and the maximum length of the
branch. It is permitted to use all connection possibilities
simultaneously. A maximum of
8 WCs
may be connected
to a Sovent fitting.
Total connection load
The maximum permissible load with waste water of a Geberit
Sovent stack d110 is
12
l/s, for d160 it is 17.0 l/s. The pipe
dimension of the stack, with main ventilation through the roof,
must be configured in the dimension ø110mm / DN 100 or
ø 160mm / DN 150 throughout.
Fitting
Dimension of
stack with main
ventillation
through roof
Maximum
load with
waste water
Sovent d110
12
l/s
ø 110mm / DN 100
Sovent d160
17.0 l/s
ø 160mm / DN 150
