Assess the specific situation Find the afflicted drain and extent of backup Check out if many drains are impacted (signifies principal line concern) Search for visible h2o hurt or overflow Simple Do it yourself Methods Pour boiling water down drain Use plunger appropriate for sink/toilet Consider baking soda + vinegar https://www.kawatan.net/why-you-should-never-use-baking-soda-and-vinegar-to-unclog-a-drain/