Custom branch line hallway bathroom toilet is backing u, upstair washer is tie into the same line. I pulled the toilet and ran a snake into it. Clear out the blockage at about 15 feet from the toilet after that I camera line find that there are cast iron pipe that run underneath the slab is very corroded and have a lot of scale in it. My chain knocker break up a lot of the scale, and the scale is sitting in the bottom of the pipe recommended customer to have it hydrojet and flush out also install a liner for the main sewer line that run under the slab.
