We had some renovations done on our family home four years ago. A couple of years ago we started having a problem in where the sink water from the kitchen upstairs along with the dishwasher was flooding the bathroom sink downstairs. We had called the contractor who said he would come to look at it and call his plumber. Unfortunately that never happened and we have now lost contact with him. We called a plumbing company who brought a snake and he did some work and then the water from the kitchen sink upstairs is no longer coming up the downstairs bathroom. But now it's happening again and it's now to the point where the water will no longer go down in the downstairs bathroom. The smell is disgusting as it's the kitchen water with food liquids coming up in the bathroom downstairs rendering it useless. I don't know what to do and I would like some ideas or opinions before I let the water dry in the pipes and seal the bathroom sink pipe for good. Thank you very much as a response is appreciated, here is some info from the looks of it the downstairs bathroom pipe is going downward then upward through a wall straight then it makes a turn on a slight slop and seems to be connected to the upstairs kitchen sink which has a long free fall. This could explain why the kitchen sink isn't backing up and why the water from kitchen sink is coming upstairs. But another opinion would be appreciated, thank you.
