Drain Lines I find like this often in my inspections. This particular one I used my snake camera inside of pipe to show the owner who for years was using Drano, very bad. I explain Drano will make a pin hole through the clog area not clear the problem. I recommended they needed to replace the galvanized pipe that was ready to burst. They agreed had a plumber snap it off. The pipe had a clogged area of 10 inches and completely rotted out.