Plumbers and government conservation organizations agree; vinegar, baking soda, and boiling water clear clogged drains.
Drain cleaner: Plunger, followed by a handful of baking soda and a half cup of vinegar. Cover and allow to sit for 15 minutes. Pour in 2 quarts of boiling water, and the clod should disappear.
Baking soda is sodium bicarbonate, a base. Vinegar is made up of water and acetic acid, which is, you guessed it, an acid. When you combine these, a reaction happens where molecules get exchanged, creating carbon dioxide and water that bubbles through the clog, breaking it up and moving the looser material.
Recipe by DIY Natural at https://www.diynatural.com/natural-drain-cleaner/