Very low construction height
The height of the levelling board is 60 mm, while the height of the sloped board (depending on the size) is 31–39 mm. Without the covering, a total height of less than 100 mm is possible.
Low construction height and easy cleaning, due to the inclusion of the odour trap in the grate frame.
In case of vertical drain connections directly through the load bearing substrate, the levelling board is not needed. In this case, the construction height is even less (31–39 mm plus covering material).