Returned to jet line. Ran camera out to detect how far down blockage was. After running camera ran jetter down line to clear blockage had helper stay inside to insure everything was draining. After clearing line ran camera once more to make sure line was clear. Customer has cast iron line and line is clear. System is draining with no leaks or issues. Upon arrival customer stated they were having trouble with the kitchen sink draining slow and then backing up into a sink in the basement. Gave customer estimate to clear blockage. Also informed customer that it was an attempt to clear it and we would have to jet the line if we’re not able to clear it. Customer approved estimate. Tried clearing the drain and was unsuccessful. Gave customer estimate to Jett line. Customer approved estimate and combing back out tomorrow to complete work.