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