krowbearHow can there be functioning bathrooms in high rises?
Waste is easy, it goes down.
For pressure, high rises have a pump in their machine room that pumps water upwards. It used to be water towers on the roofs of buildings that aides pressure
Back when I lived around the 30th floor, I would turn on the tap and then wait 10 minutes for the hot water to arrive.
The trick was to wait until the people above you were having a shower, then it would already be hot.