Evaluate the specific situation Find the influenced drain and extent of backup Look at if various drains are influenced (suggests major line situation) Seek out visible water injury or overflow Primary Do it yourself Ways Pour boiling drinking water down drain Use plunger appropriate for sink/bathroom Attempt baking soda + https://www.kawatan.net/why-you-should-never-use-baking-soda-and-vinegar-to-unclog-a-drain/