Final tip: After the treatment, run hot water for two minutes. Then drop in an enzyme-based drain cleaner once a month—those use bacteria to eat organic matter, complementing the fizzy attack of your kitchen chemistry.
A rarely mentioned risk: the reaction between baking soda and vinegar is endothermic initially but can generate heat when large quantities react with residual pipe grime. In older metal pipes with existing cracks, thermal stress could be an issue, though it’s uncommon. More importantly, if you’ve already used a commercial chemical drain cleaner (especially an acid- or lye-based one), adding vinegar or baking soda can cause dangerous heat, toxic fumes, or even pipe damage. shower drain vinegar baking soda
The magic lies in the reaction. Baking soda (sodium bicarbonate) is a weak base, and white vinegar (acetic acid) is a weak acid. When combined, they react vigorously, producing carbon dioxide gas—the familiar fizz—along with water and sodium acetate. Final tip: After the treatment, run hot water