Evaluate the Situation Identify the impacted drain and extent of backup Verify if various drains are impacted (implies major line problem) Try to look for noticeable h2o harm or overflow Primary DIY Methods Pour boiling h2o down drain Use plunger appropriate for sink/bathroom Check out baking soda + vinegar Remedy https://www.kawatan.net/how-to-find-emergency-drain-cleaning-and-plumber-services-in-etobicoke/