It is not necessary to follow the sequence of actions in this manual. Do what is convenient for you. Installation of the siphon is possible on a sink that has not yet been installed.
It is essential to remember about the sealing elements - they must be leveled and pressed evenly around the entire circumference.
The upper part of the wash or sink can be equipped with an overflow hole that prevents pouring water over the edges of the sink.
Overflow can be done with a tube (then it will need to be adjusted in height) or with a corrugated pipe (then no additional adjustments are required).
The overflow inlet is fixed through a rubber gasket to the sink with a screwdriver and screw.