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The circle is the floor drain, the WL is the riser, and the other words are not very good-looking, so make do with it.
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The key is where your water and drainage connections are.
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Water supply and drainage: washbasin - urinal - toilet.
I have to ask a professional hydropower master about this.
Your boss is too exaggerated, isn't it? If you don't let someone take you down, you can go straight to the school, ask the master for advice, or go to the next one that someone else does. Combined with design specifications.
For the bathroom to do the same floor drainage, I think this decoration method is very good. First of all, the biggest advantage of doing the same floor drainage is that the noise of the drainage in the later stage is basically 0, that is to say, we can no longer hear the sound of the upper floor draining at home. >>>More
Do not pass through the drainage bend to the bedroom on the lower floor, otherwise the drainage noise will affect your sleep. Hang a roof in the space where the lower roof passes, and give a manhole.
Drainage pipe diameter: DN100 diameter is required for toilets, DN75 is required for more than 3 urinals, and DN32 is required for washbasins. >>>More