fourth year
I have not seen a house built since the 40’s in the Chicago are that had a 6″ sewer so you are either unique or the plumber is giving you a snow job. It is true that a 3″ cleanout is too small to rod the main line if it is 4″ or larger, but it is also a fact that there should be a “full size” cleanout outside the house if it was installed to code. Depending on the conditions, you might be able to replace the whole line for $1,400.00. I suppose the “plumber” was one of the national franchise companies that pay their employees a percentage of their sales.
