The sewer had backed up for the whole building and we called PlumbPros Plumbing to help us. They were very friendly people, and they explained what was going on for us. We thought the sewage pipes ran one way, but when they ran the snake down the pipes, they discovered it was running differently. The problem had something to do with the city, so they took care of all that for us! They did a very good job for us, and we were very happy with them.