mc.jack wrote: If I set it to position 1 and press both buttons, the water remains in the cistern approx. 5 cm.
If I set it to position 1 and press the larger button, the water decreases the same.
When I set it to position 5 or 18 and press one or both buttons, it is unchanged.
So why are there two buttons, if the water is losing the same amount and this adjustment gives nothing?
For me, the same situation - I splashed for an hour - and both buttons release the same amount, regardless of the regulation. The previous flush was a start / stop type - if you don't want a full flush - you stop when you want. In this two-stage flush, this adjustment does not work as it should (i.e. the horizontal one regulates the full drain left = range minimum and the right one the maximum range, and the vertical 1/2 drain where up = range minimum and bottom maximum).
I asked my brother how he worked with this regulation - so I would tell me to spare my time - it broke down with him, he put in a new company and, in the same way, no difference. On the other hand, at a friend's house there is a built-in cistern with buttons on the wall and it works as it should.
Has anyone come to the conclusion why this is so? Are they mostly flawed and work as they please?