I recently purchased a home with a concrete slab and a laundry drain that was clogged and couldn't be cleared. The original owner had a bucket with a sump pump system installed which was working fine until winter came and the pipe froze and I found out the pipe was ran through the attic into the sofit to an upstairs toilet. I decided to try to clear the original drain I tried different drain clearing chemicals and a hand snake with no success. I had a plumber come and snake it with a drill type and he couldn't get it I cut some pipe out so he could get a better shot but still no good. The snake goes about 25ft and is cast iron looks to be 1.5" but its in the slab so not sure where it goes and what size exactly. Any suggestions? Pictures tomorrow. Thanks.