I was reading a story with the typical scenario of an team returning to their inn after several days of hard adventuring in the wilderness/dungeon/etc. So washing off is the priority of the moment. Some stories have the MC taking their bath in their room. We assume the team members take turns or they have their own bath tubs in their rooms. Note, I'm not talking about bath houses here. Now regardless of whether the bath tub was already in the room or is brought up the by the innkeeper, it is usually said that the tub is filled with buckets of water manually hauled in to the room. It's mostly well water, but hot water has to be heated over the inn's fire place. Several trips need to be made to fill the tub. I'm imagining a tub large enough for an adult to sit in. My question is: how do they get rid of the grey water after the bath? We know that the primitive setting of the story that there isn't any indoor plumbing. No fresh water taps is obvious, but no one ever considers that there aren't any drain pipes either and rented rooms are usually on the second floor. Do the inn workers need to be called in to haul out the grey water? And even if they did, where would they dump the water outside? No drain pipes means no sewers. I doubt the inn workers would want to haul the water over to a storm drain. While dumping one tub full of water out onto the back yard isn't a big deal, but what about if the half dozen members of the team also took a bath? That's a lot of water. The whole back yard would be a mud pit.