Toilet Not Unclogging

On this page

Quick answer
Confirm the symptom
Tools and prep
Step-by-step troubleshooting
Common causes table
Parts matching
When to call a pro
FAQ
Related guides

Quick answer

First, never use a toilet when it's clogged. Put on gloves and try plunging with a toilet plunger. If that doesn't work, use a toilet auger to break up the clog. If these methods fail, check for a clog deeper in the drain line.

Confirm the symptom

Toilet water rises but doesn't drain when flushed.
Water level in the bowl is higher than usual.
Toilet makes gurgling sounds but doesn't flush properly.
Multiple flushes are needed to clear the bowl.
Water backs up into other drains when the toilet is flushed.

Tools and prep

Rubber gloves
Toilet plunger
Toilet auger (or snake)
Bucket
Towels
Flashlight
Turn off water to the toilet (shutoff valve behind the toilet)
Find the toilet's shutoff valve and test it before starting.

Step-by-step troubleshooting

Plunge the Toilet
Do: Fill the plunger cup with water, place it over the drain hole, and plunge vigorously up and down.
Observe: Water drains normally after plunging.
Means: Clog is cleared.
Next: Flush the toilet to ensure it's working properly.
Use a Toilet Auger
Do: Insert the auger into the toilet drain and extend it until you feel resistance.
Observe: You feel resistance or the auger gets stuck.
Means: Clog is located.
Next: Crank the auger to break up the clog, then retract it.
Check for Deep Clogs
Do: If the auger doesn't reach the clog, there might be a deeper issue in the drain line. Check other drains in the house for backups.
Observe: Other drains are backing up.
Means: There is a main drain clog.
Next: Contact a professional plumber.
Inspect the Toilet Trap
Do: Remove the toilet (after disconnecting water and emptying the bowl) and inspect the trap for clogs.
Observe: You find a clog in the trap.
Means: Clog is located.
Next: Remove the clog and reinstall the toilet.
Check the Vent Stack
Do: Inspect the vent stack on the roof for blockages. Use a flashlight to look inside.
Observe: The vent stack is blocked.
Means: Clog is located.
Next: Clear the blockage and test the toilet.
Flush the Toilet
Do: Turn the water back on and flush the toilet to ensure it's working properly.
Observe: The toilet flushes normally.
Means: The clog is cleared.
Next: Clean up and dispose of any tools or materials used.

Common causes

Cause	Likelihood	Difficulty	Part often needed
Too much toilet paper Excessive toilet paper can create a blockage in the drain.	Common	Easy	Toilet plunger
Foreign objects Items like toys, wipes, or feminine hygiene products can clog the toilet.	Common	Easy–Medium	Toilet auger
Low-flow toilet issues Older low-flow toilets may not have enough force to clear waste.	Sometimes	Easy	None
Main drain clog A blockage in the main drain line can cause backups in the toilet.	Sometimes	Hard	Professional plumber
Damaged or misaligned flange A damaged or misaligned flange can cause leaks and clogs.	Rare	Medium	Toilet flange repair kit
Blocked vent stack A blocked vent stack can cause slow draining and gurgling sounds.	Rare	Medium	None

Parts matching

If you need to replace parts, ensure you have the right ones for your toilet model.

Toilet plunger
Toilet auger
Toilet flange repair kit
Toilet wax ring
Closet bolts
Toilet tank repair kit

Measure or take a photo of the old part to ensure you get the correct replacement.

When to call a professional

The clog is not cleared after using a plunger and auger.
There are multiple clogged drains in the house.
The toilet is leaking or damaged.
You suspect a main drain clog.
You are not comfortable performing the repairs yourself.
The toilet is old and frequently clogs.

FAQ

Can I use chemical drain cleaners to unclog my toilet?

It's not recommended. Chemical drain cleaners can damage pipes and are harmful to the environment. Stick to mechanical methods like plunging or using an auger.

How can I prevent toilet clogs?

Avoid flushing anything other than toilet paper and human waste. Use a trash can for other items. Regularly clean and maintain your toilet to prevent buildup.

What should I do if water overflows when I try to flush?

Immediately stop flushing and turn off the water supply to the toilet. Use a plunger or auger to try and clear the clog. If the water continues to rise, call a professional plumber.