Assess the problem Find the afflicted drain and extent of backup Check out if multiple drains are influenced (indicates major line issue) Hunt for visible drinking water destruction or overflow Simple Do it yourself Actions 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/