Evaluate the specific situation Locate the influenced drain and extent of backup Examine if multiple drains are influenced (implies major line issue) Hunt for visible drinking water destruction or overflow Simple Do it yourself Steps Pour boiling drinking water down drain Use plunger suitable for sink/rest room Attempt baking soda https://www.kawatan.net/why-you-should-never-use-baking-soda-and-vinegar-to-unclog-a-drain/