Have a blocked and corroded drain line from washing machine and kitchen sink. Need to replace about 30 feet of line. Any way to do without tearing up slab?

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Any way to do without tearing up slab

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If they're on a outside wall there is a possibility that the branches can be brought out side and run around the house to tie back to your sewer.
I did that with my own sink and washer. The vents will stay in place as usual and not be disturbed.
Good luck, Tom