Bolts are screwed to the floor.

About 13-15 centimeters occupies an approximate distance from the installation to the draft wall. The height must be measured accurately and correctly, taking into account the tiles and screeds. After that, you need to set everything in level, so that at least 46 centimeters are from floor to drain fasteners. Bolts are screwed to the floor. The upper part is fixed on the wall.