Assess the specific situation Identify the impacted drain and extent of backup Check if a number of drains are afflicted (indicates principal line challenge) Search for noticeable drinking water destruction or overflow Fundamental Do-it-yourself Techniques Pour boiling h2o down drain Use plunger suitable for sink/toilet Attempt baking soda + vinegar https://www.kawatan.net/why-you-should-never-use-baking-soda-and-vinegar-to-unclog-a-drain/