I have a single sink that is running slow. When I first turn the water on it immediately backs up into the sink then will start to move a bit. I have clean out in the back of the cabinet that I opened and this seemed to help the situation. So I added an AAV back there and it did not work as well. Also, I noticed when I disconnected the dishwasher line the water went right down. I will try to add a couple of pictures to show my set up. I do not think its a clog because I can run the sink with the cleanout open and it never over flows even though there is water in the sink. I replaced everything from the sink to the main drain line.