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Please note the following points in order for the air
admittance valve to function correctly:
• The air admittance valve is allowed to be installed
under the overflow edge.
• The air admittance valve must be installed vertically.
• The openings must be clean and are not allowed
to be covered.
• Intake air must be able to flow to the valve
without restrictions.
• For installation in a pre-wall, it is necessary to use a
fan housing in order to ensure adequate intake air.
15 cm
19 cm
13 cm
14 cm /16 cm
≥ 15 cm
≤ 150 cm
≥ 15 cm
≤ 10,0 m
PP
ø 32/DN 30
PP
ø 40/DN 40
PP
ø 50/DN 50
Connection dimensions for toilet pipe ventilation on
horizontal connection pipe.
Installation instructions
1
Install a connection piece on the air admittance valve
according to the type and dimension of the pipe.
2
Push the air admittance valve onto or into the
vertical pipe end, cut off at right angles. Use lubricant
if necessary.
3
Put on a thermal insulation cap if there is danger of frost.
Minimum distance above the floor, when using air
admittance valves in the attic.
15 cm
19 cm
13 cm
14 cm /16 cm
≥ 15 cm
≤ 150 cm
≥ 15 cm
• Ensure the valve is installed where it can be accessed
for maintenance and servicing.
Geberit Drainage Systems
Alternative stack ventilation system
