Assess your situation Track down the afflicted drain and extent of backup Look at if many drains are impacted (suggests primary line issue) Try to look for noticeable drinking water hurt or overflow Basic DIY Methods Pour boiling h2o down drain Use plunger suitable for sink/rest room Try baking soda https://www.kawatan.net/why-you-should-never-use-baking-soda-and-vinegar-to-unclog-a-drain/