Assess the problem Locate the afflicted drain and extent of backup Test if a number of drains are affected (suggests main line challenge) Try to find obvious drinking water destruction or overflow Standard Do it yourself Methods Pour boiling h2o down drain Use plunger appropriate for sink/bathroom Check out baking https://www.kawatan.net/how-to-find-emergency-drain-cleaning-and-plumber-services-in-etobicoke/