Assess the problem Find the afflicted drain and extent of backup Test if several drains are afflicted (signifies most important line situation) Search for seen h2o hurt or overflow Fundamental Do it yourself Steps Pour boiling drinking water down drain Use plunger suitable for sink/toilet Test baking soda + vinegar https://www.kawatan.net/why-you-should-never-use-baking-soda-and-vinegar-to-unclog-a-drain/