Assess the specific situation Find the impacted drain and extent of backup Test if many drains are impacted (indicates most important line challenge) Seek out visible h2o injury or overflow Basic Do-it-yourself Steps Pour boiling drinking water down drain Use plunger suitable for sink/rest room Consider baking soda + vinegar https://www.kawatan.net/why-you-should-never-use-baking-soda-and-vinegar-to-unclog-a-drain/