Assess the problem Track down the affected drain and extent of backup Test if many drains are influenced (indicates key line concern) Try to look for noticeable drinking water harm or overflow Standard Do it yourself Steps Pour boiling water down drain Use plunger appropriate for sink/toilet Try out baking https://www.kawatan.net/why-you-should-never-use-baking-soda-and-vinegar-to-unclog-a-drain/