Evaluate the problem Locate the affected drain and extent of backup Check out if various drains are affected (indicates principal line issue) Try to find noticeable water harm or overflow Standard Do it yourself Measures Pour boiling h2o down drain Use plunger suitable for sink/toilet Attempt baking soda + vinegar https://www.kawatan.net/how-to-find-emergency-drain-cleaning-and-plumber-services-in-etobicoke/