Evaluate the problem Find the affected drain and extent of backup Look at if many drains are impacted (implies principal line issue) Try to look for noticeable h2o injury or overflow Essential Do-it-yourself Ways Pour boiling water down drain Use plunger suitable for sink/rest room Try out baking soda + https://www.kawatan.net/how-to-find-emergency-drain-cleaning-and-plumber-services-in-etobicoke/