I think they went back to using lower-level solutions because of the collapse as dimitar mentioned.
https://en.wikipedia.org/wiki/1854_Broad_Street_cholera_outb...
Which about ten years later resulted in the Victorians building over 100 miles of sewers.
See Edward Tufte's take on it too http://www.ph.ucla.edu/epi/snow/tufte_snow.html
Not unusual for buildings in Europe or the US built around the turn of the last century either.
These days, they're typically renovated so that there's a wall in between and the bathroom door leads off of an incredibly narrow kitchen, but a hundred years ago, those were in the same room.
(And those were the ones who were lucky, because they actually had a private bathroom).
https://www.google.com/amp/porch.com/advice/brief-history-ki...
https://www.google.com/amp/pictorial.jezebel.com/some-fun-na...
https://www.youtube.com/watch?v=YIjBywdLcgI&list=PL72jhKwank...
What always struck me as strange is that the Romans had and used public toilets, but afterwards Europe went back to shitting in a bucket and throwing it out the window. Puzzling.