Viega 4982.92 Instructions For Use Manual page 13

Handling
Check whether grounding is required.
Set the base unit to the upper edge of the screed.
Align it horizontally in all directions.
INFO! The drain is 180° rotatable.
Connect the drain DN40 or the adapter element DN50 to the
drainage system.
The wastewater pipe can also be laid under the shower channel
base unit.
Put in the odour trap insert.
Advantix odour trap 13 from 16