Whole-property symptoms
Signs the problem sits in the main line
Several drains slowing at once, a toilet that gurgles when another fixture drains, wastewater coming up in a tub or shower drain and sewer odors indoors all suggest a shared line rather than one fixture. Unexplained soggy ground along the line's route also merits a look, though the source needs confirming.
While wastewater is coming back up, leave the affected fixtures unused and keep clear of the water. Tell the office which drains are involved and whether the backup is happening now. You do not need to know where the line has failed to request service.
