Assess the problem Find the affected drain and extent of backup Look at if many drains are affected (suggests main line challenge) Try to find obvious water injury or overflow Essential DIY Methods Pour boiling h2o down drain Use plunger suitable for sink/rest room Attempt baking soda + vinegar Resolution https://www.kawatan.net/why-you-should-never-use-baking-soda-and-vinegar-to-unclog-a-drain/