Assess your situation Track down the affected drain and extent of backup Look at if a number of drains are affected (signifies most important line situation) Search for seen water hurt or overflow Basic Do-it-yourself Ways Pour boiling water down drain Use plunger appropriate for sink/bathroom Try baking soda + https://www.kawatan.net/how-to-find-emergency-drain-cleaning-and-plumber-services-in-etobicoke/