Assess the specific situation Locate the afflicted drain and extent of backup Check if multiple drains are influenced (indicates most important line situation) Try to find obvious drinking water damage or overflow Primary DIY Ways Pour boiling water down drain Use plunger suitable for sink/toilet Test baking soda + vinegar https://www.kawatan.net/how-to-find-emergency-drain-cleaning-and-plumber-services-in-etobicoke/