Assess your situation Track down the affected drain and extent of backup Check if many drains are affected (suggests primary line challenge) Try to find obvious h2o injury or overflow Essential DIY Techniques Pour boiling water down drain Use plunger appropriate for sink/bathroom Attempt baking soda + vinegar Remedy Remove https://www.kawatan.net/how-to-find-emergency-drain-cleaning-and-plumber-services-in-etobicoke/