Our technicians opened the wall to inspect the toilet drain and found the flange in good condition, but the drain line leading to the main stack was improperly pitched, restricting proper drainage. We opened the wall further, removed the affected piping, and repositioned the drain line with new piping at the correct slope. The toilet was then reset, and the system was tested for proper drainage and leaks. No leaks were found, and the system was operating correctly upon completion.