New Sewer Pipe.

Well, it could be worse. Apparently when we had our sewer inspection before we bought the house and moved in (18 months ago), the inspection company only checked the "branch" line. The main line had a major problem. The good news is that that company paid for it! I felt really happy that some people in this world stand behind their work, and take responsibility for a mistake. Thank you! This would have been expensive!