Spinning house connections - curious

[clippan]

Spinning houses - curious

I read about spinning houses and got a bit curious about how they handle water and sewage as well as the electrical connection. They should be on some kind of "central axis," but how do they solve these connections practically, i.e., how do they make these connections withstand rotation?

 

[Claes Sörmland]

It seems to be quite complicated:

 

[RoTe]

No more difficult than on an excavator.