What is that you ask? Its a very expensive and disruptive project. This is the pipe in the ground that connects your waste water line to the main sewer line in the street. The house is 8 years old with all pvc sewer line going out to the street. The distance is about 160 feet. House is set back on property. Hair salon on the 1st floor and we live in the 2 stories above it. Had a problem about a month ago, an older woman flushed something down the toilet in the salon and blocked the toilet. Got that cleared out with an auger. 3 weeks later the main drain is blocked. Called the plumber and he came out and cleared the clog. Ok fine less than 1 week later main line is clogged again. Call him again and he comes out and his auger gets stuck in the line, finally manages to get it back out and it is covered in tree roots. ??? Called waste management services and they come out and a takes a look. He says to save me some money they will bring the camera out on Monday and scope the pipe. Well it will save me $400.00 for this, I had asked the plumber how much to scope the pipe. Also asked the plumber how far the clog was and he estimated around 160 ft. So that puts it at the interceptor. The waste water company will absorb the cost of digging up the street and repairing the pipe and repave the hole. If I hired a contractor to do this we are looking at 10-12 thousand to fix this. We have had a lot of vibrations because of a new parkway entrance is being constructed across the street. Don't know if all this made the pipe sink and crack or has come off and tree roots are getting in. So we shall see Monday how this all works out.