Assess the problem Locate the influenced drain and extent of backup Examine if various drains are impacted (suggests major line problem) Try to look for noticeable drinking water damage or overflow Primary DIY Measures Pour boiling h2o down drain Use plunger suitable for sink/toilet Consider baking soda + vinegar solution https://www.kawatan.net/why-you-should-never-use-baking-soda-and-vinegar-to-unclog-a-drain/