Evaluate the specific situation Identify the influenced drain and extent of backup Examine if numerous drains are influenced (indicates major line problem) Try to look for noticeable drinking water damage or overflow Standard Do it yourself Measures Pour boiling h2o down drain Use plunger suitable for sink/toilet Test baking soda https://www.kawatan.net/how-to-find-emergency-drain-cleaning-and-plumber-services-in-etobicoke/