Customer drain was backing up on the garbage disposal side upon arrival I tested the kitchen drain to see what was affected and after my testing, I pinpoint it that it was grease in the lawn that was actually backing up into the left side because it was lower than the right side of the sink, but both sides were affected, so I gave a option to run my cable down the line and after I ran my flex shaft I was able to clear the blockage and after testing the water was moving perfectly with no backups and no leaks