We are on the 3rd floor of a condo with 10 levels. When a load of wash is done, the toilet bubbles. We have raised the toilet to be on the same level as the tub, had numerous plumber calls, snaked, and changed from a flush into the wall unit to a flush down unit, but it still bubbles. Any thoughts? It is driving us nuts. Thanks
this prolbem could caused by improper point of connection between the two fixtures or backpitch in the line or some type restriction in drain. newer washing machines discharge a greater quanity of water/minute. I would find a company that has a camera to run in the line.