The idea is simple: pour baking soda and vinegar into the bowl, let it fizz and wait for the clog to clear. It sounds like a safe, natural way to open a stopped toilet, and sometimes a soft clog does move. But the reaction is gentle, it works only on small, soft blockages and it does little against paper wads, wipes, toys or a clog deeper in the line.
If your toilet is overflowing, skip the home remedy and shut the valve behind the toilet. Read our toilet repair page for what to do first. If you are only dealing with a slow flush, read on.
Causes.
Why toilets clog in the first place.
Most clogs are some mix of too much paper, a low-flow toilet with a weak flush, and something that should never have gone down. A modern toilet moves less water than older models, so a heavy load of paper can stall in the trap. Wipes, cotton balls, dental floss and paper towels are common culprits, because they do not break apart.
Children's toys and hygiene products are another frequent cause, and those are the ones that no home remedy will dissolve. If a clog appears right after something fell in, stop and use an auger or call. Pushing an object further down makes it harder to retrieve.
Prevention.
Keep a clog from coming back.
Use only toilet paper and waste in the bowl, keep a wastebasket within reach so wipes have somewhere else to go, and flush twice for large loads. A slow flush every day is a sign the rim jets or the trap are partly blocked, and a little descaling now beats a stoppage on a holiday weekend.
The science.
What vinegar and baking soda actually do.
Baking soda is a base and vinegar is a weak acid. Together they produce carbon dioxide gas, water and a salt. The bubbling may loosen soft grease or a thin film, but there is not enough force to move a solid mass. It can help with a partial clog that has a little give.
Vinegar is safe for pipes and for septic tanks in normal amounts, which is one reason people choose it. Never combine it with bleach or a commercial drain cleaner. Those combinations can release toxic gas.
What to try.
A safe order of steps.
Stop the water.
Close the valve behind the toilet or lift the tank lid and push the flapper closed. Do not flush again.
.Try a flange plunger.
A flange plunger seals in the toilet outlet. Press slowly first to push air out, then plunge with firm steady strokes for about twenty seconds.
.Use hot water and dish soap.
Pour a squirt of dish soap into the bowl, then add hot, not boiling, water from waist height. Boiling water can crack porcelain.
.Add baking soda and vinegar if you wish.
About a cup of baking soda, then two cups of vinegar. Wait about thirty minutes, then plunge again.
.Use a closet auger.
A toilet auger has a protective sleeve for porcelain. Feed it in, turn the handle and pull back any obstruction.
.
| Cause of clog | Vinegar helps? | Better tool |
|---|---|---|
| Excess toilet paper. | Sometimes, marginally. | Plunger, hot water and soap. |
| Wipes and feminine products. | No. | Closet auger, or a plumber. |
| A toy or hard object. | No. | Auger, or removing the toilet. |
| Main line clog. | No. | Cable machine, see sewer line cleaning. |
| Slow flush from clogged rim jets. | Soaking can help a little. | Descaling the jets. |
Signs the problem is bigger than the toilet.
If the bathtub or floor drain gurgles when you flush, or other fixtures are slow, the clog is probably in a branch or the main drain. Stop using water and call. Repeated plunging will not help and can spill sewage.
Why older Salem houses clog toilets more.
Salem has many houses from the 1700s through the early 1900s, and the large part of the city rebuilt after the Great Salem Fire of 1914 added many houses from that era. Cast iron stacks and drain lines in houses of that age often scale inside, which narrows the pipe and catches paper. A toilet that clogs every few weeks in an old house may have a narrowed drain, not a poorly made toilet.
Wipes labeled flushable are a particular problem in older drains and in multi-family houses where one stack serves several units. They do not break down like paper. If you have repeated clogs, a camera inspection can tell you whether the line is the issue, and a plumber can advise on drain cleaning. Plumbers licensed in Massachusetts are regulated by the state, and you can check a license with the state board.
We serve Salem and Beverly for toilet and drain emergencies, day and night.
Safety.
When to stop and call.
Do not mix vinegar with bleach or a commercial drain cleaner, because the combination can release harmful fumes. According to the standard advice on product labels, never combine cleaning chemicals. If the bowl rises toward the rim, stop flushing and close the supply valve behind the toilet.
Questions.
Clogged toilet questions from Salem homeowners.
Only soft, minor clogs, and weakly. A plunger or a closet auger works better.
No. Boiling water can crack the porcelain. Hot tap water is enough.
In normal home amounts, yes. Do not mix it with bleach or commercial drain cleaners.
When the plunger and auger fail, when more than one drain is affected or when the toilet overflows.
They often do not break down like toilet paper. They are a common cause of clogs in older drains.