Will vinegar and baking soda unclog your toilet?

Short answer: sometimes, for a small, soft clog near the top of the trap. Baking soda and vinegar will not move anything solid, and on a real blockage you are better off going straight to a flange plunger. Never mix vinegar with bleach or a chemical drain cleaner.

What the fizz actually does

Baking soda is a base and vinegar is a weak acid. Put them together and they react, releasing carbon dioxide, which is the bubbling you see. The reaction is real, but it is short and gentle. Most of it happens at the surface of the water in the bowl, a long way from where a toilet clog usually sits, which is inside the curved trap built into the base of the toilet.

The hot water you pour in afterward does as much work as the fizz. Warm water softens toilet paper and waste, and that is often what gets a marginal clog moving.

When it is worth a try

• The water drains, just slowly.
• The clog is toilet paper or waste, nothing solid.
• You do not have a plunger in the house yet.

If the bowl is full and not dropping at all, or you know something solid went down (a toy, a phone, a wad of wipes), skip it. Fizz will not shift any of those.

How to try it properly

1. If the bowl is very full, bail some water out into a bucket first so nothing overflows.
2. Pour in about one cup of baking soda.
3. Slowly add about two cups of white vinegar. It will foam up, so go slowly.
4. Leave it for around 30 minutes.
5. Pour in a bucket of hot tap water from a little height. Hot, not boiling: boiling water can crack the porcelain or damage the wax seal under the toilet.
6. Wait a few minutes before you flush, and keep a hand near the flapper in the tank in case the level starts rising.

What not to do

• Do not mix vinegar with bleach. Combining an acid with bleach releases chlorine gas, which is dangerous in a small bathroom.
• Do not add vinegar after a chemical drain cleaner, or a drain cleaner after vinegar. If you have already poured a chemical product in, leave the bowl alone and tell whoever comes to fix it.
• Do not keep flushing to test it. Wait until the water level has gone down on its own.

What works better

A flange plunger, the kind with a rubber sleeve that folds out of the cup, clears most toilet clogs in a few minutes. If it does not, a toilet auger reaches into the trap and breaks the clog up or pulls it out. We walk through both, step by step, in how to unclog a toilet.

When it is not the toilet at all

If the tub gurgles when you flush, more than one toilet is slow, or the lowest drain in the house backs up, the blockage is probably in the main sewer line. Tree roots and old cast iron are common causes in North Texas, and no home remedy reaches them. We use a camera to find the cause before recommending a fix. See drain cleaning or toilet repair and replacement if the toilet itself keeps clogging.

Genzel Plumbing is a family-owned, licensed plumber in McKinney, serving homes across Collin County since 2001. Call (972) 238-5585.