Why are there extra pipes coming out of the ground?
I guess i'm confused why they would split above ground like that.


That's the sort of thing that can happen when a property is altered. Maybe the building originally had fewer washbasins etc on that floor and more were added. Rather than lifting the floor and making connections in cramped dark dirty spaces the plumber felt it was easier to make the solder connections in a more accessible space where his blowtorch was also less likely to set fire to nearby joists and accumulated dust and detritus.