Can Someone tell me if this looks ok? I didn't do it, it was that way when I got the house. I have been getting backflow where the black tube is going in. Mostly when Clothes washer and dish washer drain. I think clog might be outside of house in ground. What do you think?
It is done so complicated. I can see only drain pipes. I think you need a professional plumber, who can fix all this. I could tell you something but this picture is not sufficient to get idea about the connection establishment. You can send picture to Plumbers Near Me to get some suggestion.