How loud is too loud?
Different types of installations cause different noise levels.
The reactions of the people sleeping reveal a lot about the volume of the flushing noise.
Select and flush system.
Installation 1
Installation 2
Installation 3
An exposed cistern and building drainage system from the 1960s
A concealed cistern and building drainage system from the 1990s
A new system featuring a concealed cistern and a highly sound-insulating drainage system