Water leak showing up in basement. Issue is located under laundry room. Had Christian run washing machine. Soon as it went to drain water started coming through the ceiling in basement. Gave customer estimate to replace washing machine box and standp trap. After opening up wall found cast iron cracked on stack where p-trap enters sewer. Informed customer we would need to replace section there and below ceiling. Customer approved estimate. We will return tomorrow with restoration company to finish work. Returned to install new pvc, washing machine box. Tested all systems, system is draining with no leaks or issues