Evaluate the Situation Identify the affected drain and extent of backup Check if multiple drains are afflicted (implies principal line difficulty) Search for noticeable water injury or overflow Primary Do it yourself Ways Pour boiling drinking water down drain Use plunger suitable for sink/toilet Consider baking soda + vinegar Alternative https://www.kawatan.net/why-you-should-never-use-baking-soda-and-vinegar-to-unclog-a-drain/