After three kitchen sink backups, my plumber used a video camera to inspect the drain system down to the main. He found several bellys and flat areas along about 50% of the 78 feet of pipe. He suggested that hydrojetting would be a waste (no pun intended), since it would continue to be a problem because of the bellys and flat areas. He recommended cutting through the slab to replace and properly grade the 78 feet of drain pipes. Does this make sense? Am I setting myself up for more problems? Homeowners insurance should cover this, but is it likely it’s necessary?? I would really appreciate your opinions! Thank you –Steve in Anaheim, Calif.