I'm looking for a way to find a certain type of tap but I'm not native English and have no idea of the terminology, or even what I need exists…
Wall has 2 pipe endings, 15cm apart.
I need one big lever to mix both hot and cold (ceramic thing?).
Output is 1 tub filling normal flow.
Another output is to handheld shower head.
The most important is that the switch between the 2 outputs should NOT be automatic. I've seen those with 2 different controls (one hot, one cold) where the switch is manual. But I haven't seen any solution with manual switch that also has 1 big lever for mixing.
The reason is that the automatic is very fiddly for me. I almost exclusively use the handheld shower output and I hardly ever want the tub filling output (but it's nice to have). I don't wish to fiddle every day with the pressure-sensitive switch, since it all defaults to tub-filling mode as far as I know.
Best Answer
Google 'bar mixing valve' or 'thermostatic bar mixing valve'.
The one you picture looks to me like it is not thermostatic nor pressure balancing. It has no 'anti-scald' protection. Anti-scald valves are now required for a shower in nearly every plumbing code as far as I know.
The bar mixing valve type has the advantage that the entire valve is outside the wall, enabling repair or complete replacement without disturbing the wall.