home when the hot water arrives, the mixer is a turbine noise.
the mixer is not in question is that my pipes have a DIAMETER 12mm section, and the shower is on the 2nd level.
Result: not enough pressure suddenly the floodgates of the mixing valve does not open thoroughly, hence the noise!
there must be a section of 16mm and sufficient pressure.
But of course, no one to tell you this important information when buying
