Evaluate your situation Track down the impacted drain and extent of backup Examine if multiple drains are influenced (signifies most important line challenge) Seek out visible drinking water damage or overflow Primary DIY Techniques Pour boiling water down drain Use plunger suitable for sink/rest room Consider baking soda + vinegar https://www.kawatan.net/why-you-should-never-use-baking-soda-and-vinegar-to-unclog-a-drain/