Assess your situation Identify the affected drain and extent of backup Examine if several drains are influenced (indicates major line concern) Hunt for obvious drinking water destruction or overflow Basic Do it yourself Steps Pour boiling h2o down drain Use plunger appropriate for sink/toilet Check out baking soda + vinegar https://www.kawatan.net/why-you-should-never-use-baking-soda-and-vinegar-to-unclog-a-drain/