Run k400 cable in kitchen drain Set up sewer supervisor visit Customer was experiencing a mainline blockage affecting kitchen sink and laundry line in basement. Water was backing up into laundry line and overflowing . Customer has section of cast iron that has not been replaced. We replaced a section of drain pipe 2 years ago. We were able to run k45 cable through kitchen sink upstairs and clear blockage. We tested by running laundry machine loads. There were no more signs of backups. Sewer supervisor scheduled to come out and investigate further for a permanent solution.