Evaluate the specific situation Identify the influenced drain and extent of backup Examine if multiple drains are impacted (implies principal line issue) Look for noticeable h2o harm or overflow Primary DIY Methods Pour boiling h2o down drain Use plunger appropriate for sink/bathroom Test baking soda + vinegar Answer Take away https://www.kawatan.net/why-you-should-never-use-baking-soda-and-vinegar-to-unclog-a-drain/