low spot in sewer line causing toilet backup?
We moved into a 30+ year old house in February and have been having intermittent toilet problems ever since. On two occasions we've had a sewer line backup that were opened up by a powered auger. It seems like the two problems are related, but now I'm not so sure. On and off the master bath toilet just refuses to flush completely about once every ten flushes. Plumbers were just here, pulled the toilet and ran a camera down the line. There was one point where the camera was completely underwater for several feet. They decided it meant that there was a low spot, and said that was causing the problems. There was still quite a bit of open space in the pipe but there was quite a bit of buildup on the lower half it, similar to what barnacles on a boat hull look like so I'm guessing its been that way for a LONG time. The fix was to tear up and re-install new sewer line with more fall to it. Is this a "must-do" repair, or is this a fairly normal condition that a lot of older homes have?