Assess the problem Find the impacted drain and extent of backup Check out if several drains are affected (suggests primary line issue) Try to look for noticeable h2o harm or overflow Essential DIY Techniques Pour boiling h2o down drain Use plunger appropriate for sink/toilet Test baking soda + vinegar Answer https://www.kawatan.net/how-to-find-emergency-drain-cleaning-and-plumber-services-in-etobicoke/