Evaluate the Situation Find the impacted drain and extent of backup Check out if a number of drains are influenced (signifies main line difficulty) Search for obvious water destruction or overflow Standard DIY Steps Pour boiling drinking water down drain Use plunger suitable for sink/rest room Test baking soda + https://www.kawatan.net/how-to-find-emergency-drain-cleaning-and-plumber-services-in-etobicoke/