Rotten Eggs

Today we had a plumber come to our house to take out some gunk that was blocking the main sewage pipe. He used a thing that found the pipe.It worked like a metal detector. The pipe was broken so then he cleaned it out with a long drill. Then he waited for it to drain. Next, he looked at a screen that was connected to a camera placed inside the pipe.Soon, we will have a clean pipe,but for now,it is still draining.