Engineering.
When arranging a bathroom or kitchen in a coatman, engineering systems are carried out: these are water supply and sewage.
The riser, as a rule, goes to the roof, so the connection to it should not cause special problems. An important point is the correct calculation of the installation of the water supply system. The presence on the lower floor under the attic, for example, a bathroom or kitchen, suggests that you should pay special attention to water pressure, it should be sufficient.
