Powder room sink backed up off of kitchen 100% when I arrived pulled trap and rodded lav arm over to San tee. Line was completely blocked up with rust and sediment. Was not able to get rod to go down San tee. I had to go in basement and cut out section of pipe below lav and rod up the stack to open blockage. I hooked pipe back up with 2” no hub bands and tested. Everything is draining and working as should now