Evaluate the problem Track down the afflicted drain and extent of backup Verify if several drains are impacted (signifies principal line situation) Hunt for seen drinking water injury or overflow Simple DIY Steps Pour boiling h2o down drain Use plunger suitable for sink/toilet Try baking soda + vinegar solution Take https://www.kawatan.net/why-you-should-never-use-baking-soda-and-vinegar-to-unclog-a-drain/