Customer had a large amount of build up of toilet paper in sewer line. Performed camera inspection and noticed customers cast iron pipe had large amounts of corrosion. Highly recommend digging up sewer line where house exits house and installing two way access cleanout. Once cleanout is installed we can descale sewer line to prevent future clogs Increased cleanout and descaled sewer line. Customer had severe build up on the bottom of the 3” cast iron sewer main which reduced the internal diameter of the pipe to 2”. Was able to perform descaling and remove majority of the build up.