My contractor is awful. If we weren't almost done with the project, I would kick him off my property and sue him.
Anyway, it appears that he dumped excess thinset or grout into my basement toilet. It caused a backup in my basement tub, toilet, and sink. It looks like someone hastily cleaned it up, but only a little. I have now cleaned it from the room and everything is flushing and draining normally.
However, we have a septic system. Will we need to have the septic tank pumped?