Additional Ventilation Of The Drain Section (Optional) - Rational iCombi Pro Original Installation Instructions

9 | Wastewater connection
Device size 6 half size GN to 10 full size GN
The average height of the wastewater connection for tabletop devices is ap-
prox. 50 mm [1.57 inch].
Device size 20 half size GN, 20 full size GN
The average height of the wastewater connection is 70 mm [2.76 inch].
9.3

Additional ventilation of the drain section (optional)

Overflow of the device due to external siphon
The device is already equipped with an integrated siphon. A second,
external siphon without ventilation of the drain section causes the device to
overflow.
No external siphon may be connected to the wastewater connection
without upstream ventilation.
Make sure that there is a free outflow zone or vent at the wastewater
connection.
If an external siphon is connected, the device requires additional ventilation of
the drain section via a vent pipe which is attached to the drain pipe and pre-
vents the device from overflowing. This vent pipe is provided with holes in the
lower area to achieve a suction effect.
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