Due to the shape of my building that every floor does not align with each other, the locations of my restrooms were all very different. At the first floor, three restrooms were built:
For men’s and women’s restrooms, three toilets and two sinks were built, this pattern is also applied to most of the other levels. For the gender-neutral restroom, two toilets and two sinks were placed.
Between two restrooms, a small space was created to contain the pipelines:
In level 3, a small space (Orange Shade) was added to contain the pipelines from the level below.
The pink-shaded room was the mechanical room.

For level 7, the larger empty space left was to avoid having pipelines exposed outside of the building.



Difficulties:
Since the restrooms were not aligned vertically, I have to connect all the pipelines over levels, and it increased my workload and difficulty of changing a part of the pipeline system.