Evaluate your situation Track down the impacted drain and extent of backup Verify if various drains are impacted (implies principal line issue) Hunt for visible drinking water damage or overflow Standard Do it yourself Measures Pour boiling h2o down drain Use plunger appropriate for sink/toilet Test baking soda + vinegar https://www.kawatan.net/how-to-find-emergency-drain-cleaning-and-plumber-services-in-etobicoke/