Assess the specific situation Track down the influenced drain and extent of backup Check out if several drains are affected (suggests principal line issue) Try to look for seen h2o hurt or overflow Fundamental Do it yourself Actions Pour boiling h2o down drain Use plunger appropriate for sink/toilet Try baking https://www.kawatan.net/how-to-find-emergency-drain-cleaning-and-plumber-services-in-etobicoke/