Evaluate the Situation Track down the impacted drain and extent of backup Check if many drains are affected (suggests primary line difficulty) Try to find obvious water problems or overflow Fundamental Do it yourself Steps Pour boiling drinking water down drain Use plunger suitable for sink/toilet Try out baking soda https://www.kawatan.net/how-to-find-emergency-drain-cleaning-and-plumber-services-in-etobicoke/