Assess the Situation Identify the influenced drain and extent of backup Examine if multiple drains are influenced (indicates most important line situation) Search for obvious water problems or overflow Simple Do it yourself Measures Pour boiling h2o down drain Use plunger appropriate for sink/bathroom Check out baking soda + vinegar https://www.kawatan.net/how-to-find-emergency-drain-cleaning-and-plumber-services-in-etobicoke/