A blocked toilet is one bathroom problem that needs to be dealt with quickly. Whether the water is draining slowly, rising towards the rim or refusing to disappear after flushing, knowing what to do next can help prevent a messy overflow.
The first rule is simple: don't keep flushing a blocked toilet.
Repeated flushing adds more water to the bowl without clearing the blockage, which can cause overflow.
Fortunately, many minor toilet blockages can be cleared at home with a plunger, warm water or a toilet auger. Below, we'll explain how to unblock a toilet safely, what to try without a plunger and when it's time to call a plumber.
How Do You Unblock a Toilet?
The best way to unblock a toilet is usually to use a toilet plunger to create pressure and suction around the outlet, helping to loosen and move the blockage through the waste pipe.
For a typical blocked toilet:
- Stop flushing.
- Put on rubber gloves.
- Remove some water if the bowl is close to overflowing.
- Position a toilet plunger firmly over the outlet.
- Push down gently at first to remove trapped air.
- Plunge several times firmly.
- Remove the plunger and watch whether the water drains.
- Test with a small amount of water before flushing normally.
If the blockage doesn't clear, don't panic. There are several other methods you can try.
First: Stop the Toilet From Overflowing
If you've flushed the toilet and the water is rising towards the rim, don't flush again.
Wait to see whether the water gradually falls. A partial blockage may still allow water to drain, just much more slowly than normal.
If the bowl is dangerously full, carefully remove some of the water using a small container and transfer it into a bucket.
Put old towels around the base of the toilet before you begin, especially if the bowl is already nearly overflowing.
If necessary, you can also locate the isolation valve on the toilet's water supply and turn it off.
Once the water is at a manageable level, you can start tackling the blockage.
What Causes a Blocked Toilet?
Most toilet blockages happen because waste or another object becomes trapped in the toilet's internal trap or waste pipe.
Common causes include:
- Too much toilet paper
- A large amount of waste
- Wet wipes
- Baby wipes
- Sanitary products
- Cotton wool and cotton buds
- Paper towels and kitchen roll
- Nappies
- Children's toys
- Other objects accidentally dropped into the toilet
- A blockage deeper within the waste or drainage system
Even products described as "flushable" may not break down as quickly as conventional toilet paper.
As a general rule, only human waste and toilet paper should normally be flushed down a toilet.
How to Unblock a Toilet With a Plunger
For an ordinary blockage, a plunger should usually be your first option.
Ideally, use a toilet or flange plunger rather than a flat sink plunger. The extended rubber section helps create a better seal around the toilet outlet.
Step 1: Check the Water Level
The rubber end of the plunger needs enough water around it to create an effective seal.
If there isn't enough water, add some manually.
If the bowl is close to overflowing, remove some water first.
Step 2: Position the Plunger
Place the plunger directly over the outlet at the bottom of the toilet bowl.
Make sure the rubber section completely covers the opening.
A good seal is important because the plunging action relies on pressure changes.
Step 3: Start Slowly
Make the first push relatively gentle.
This helps remove trapped air from the plunger without sending toilet water splashing around the bathroom.
Step 4: Plunge Firmly
Once you've established a seal, move the plunger firmly up and down several times.
Try to maintain the seal rather than completely removing the plunger between movements.
Both the pushing and pulling actions can help loosen the blockage.
Step 5: Check the Water
Pull the plunger away and watch what happens.
If the water suddenly drains away, that's a good indication that the blockage has cleared.
Step 6: Test the Toilet Carefully
Don't immediately flush several times.
Instead, pour some clean water into the bowl and make sure it drains normally.
If everything looks clear, perform a normal flush while watching the water level.
How to Unblock a Toilet Without a Plunger
No plunger?
For a minor blockage caused primarily by toilet paper or waste, there are a couple of things you can try.
Use Washing-Up Liquid and Warm Water
Washing-up liquid can help lubricate the toilet trap, while warm water may help soften a blockage consisting of toilet paper and organic waste.
Add a generous squeeze of washing-up liquid to the bowl.
Leave it for around 10–20 minutes.
Then carefully add a bucket of warm, not boiling, water.
Leave the mixture to work and watch whether the water level begins to fall.
Never pour boiling water into a toilet. A sudden temperature change can potentially damage ceramic sanitaryware.
If the water begins draining freely, test the toilet carefully before using it normally.
Give Toilet Paper Time to Break Down
If the blockage is mainly toilet paper and the toilet isn't urgently needed, waiting may help.
Toilet paper is designed to break down when exposed to water.
Allow the blockage time to soften, then try adding a modest amount of water to see whether the bowl drains.
Don't repeatedly flush while you're waiting.
How to Unblock a Toilet With a Toilet Auger
If plunging doesn't work, the next step may be a toilet auger, sometimes called a toilet snake.
A toilet auger uses a flexible cable that can travel around the toilet trap and reach obstructions that a plunger cannot clear.
Unlike improvised metal objects, a proper toilet auger is designed for use with toilets.
How to Use a Toilet Auger
Carefully insert the end of the auger into the toilet outlet.
Turn the handle while gradually feeding the cable into the trap.
When you feel resistance, continue rotating the auger rather than aggressively forcing it.
Depending on the blockage, the auger may:
- Break through it
- Push it through the trap
- Hook onto the obstruction so it can be retrieved
Once you've worked through the obstruction, slowly withdraw the cable.
Test the toilet with a small amount of water before attempting a normal flush.
If the auger can't clear the blockage, the problem may be further into the drainage system.
How to Unblock a Toilet Full of Waste
If a toilet is blocked with waste and toilet paper, the basic approach is the same.
Most importantly, don't keep flushing it.
Wait for the water level to fall.
If there's too much material in the bowl to use a plunger effectively, you may need to remove some while wearing suitable rubber gloves carefully.
Once the bowl is manageable, position a toilet plunger over the outlet and plunge firmly.
For a blockage consisting mainly of toilet paper and organic waste, washing-up liquid and warm water may also help soften it.
What Should I Do If the Toilet Water Is Rising?
If the water rises after you flush:
Don't flush again.
Give the toilet time to drain.
If water continues to enter the bowl, turn off the water supply at the toilet's isolation valve, where possible.
If the water level gradually falls but the toilet drains very slowly, you probably have a partial blockage.
Use a plunger before attempting another normal flush.
Can I Use Chemicals to Unblock a Toilet?
Strong chemical drain cleaners generally aren't the best first choice for a blocked toilet.
A chemical cleaner won't necessarily remove physical objects such as wet wipes, sanitary products or toys. It can also create an additional hazard if you subsequently need to plunge or manually work around the toilet bowl.
Never mix different drain cleaners or household chemicals.
Some combinations of cleaning products can create dangerous chemical reactions or fumes.
For an ordinary toilet blockage, mechanical methods such as a plunger or toilet auger are generally the more sensible starting point.
Can Bleach Unblock a Toilet?
Bleach isn't a reliable way to unblock a toilet.
Although bleach is commonly used for toilet cleaning, it won't physically remove objects such as wipes, sanitary products or toys.
It should also never be mixed with other cleaning chemicals.
If your toilet is blocked, use a plunger first.
Can Baking Soda and Vinegar Unblock a Toilet?
Baking soda and vinegar are frequently suggested online as a DIY drain-unblocking solution.
While mixing them produces a visible fizzing reaction, this isn't a substitute for the physical pressure created by a toilet plunger.
For a minor toilet-paper blockage, warm water and washing-up liquid may help.
For a more substantial obstruction, use a toilet plunger or toilet auger.
What Not to Do With a Blocked Toilet
Knowing what not to do can prevent a simple blockage from becoming a bigger problem.
Don't Keep Flushing
This is one of the most common mistakes.
If the first flush raises the water level, another flush can cause the toilet to overflow.
Don't Pour Boiling Water Into the Bowl
Very hot water can cause sudden temperature changes in ceramic sanitaryware.
Use warm water instead.
Don't Force Random Objects Down the Toilet
Avoid poking coat hangers, metal rods or other improvised tools around the toilet trap.
You could scratch the ceramic, damage the toilet or push the blockage somewhere more difficult to reach.
Use a proper toilet auger.
Don't Mix Cleaning Chemicals
Never combine bleach with other cleaning or drain-unblocking products.
Don't Ignore Repeated Blockages
If the same toilet keeps becoming blocked, there may be an underlying drainage or pipework problem.
Clearing the immediate obstruction won't necessarily solve the cause.
How Do I Know If the Blockage Is in the Toilet or the Drain?
If only one toilet is affected, the blockage may be within the toilet trap or relatively close to it.
Signs of a wider drainage problem include:
- Several toilets are draining slowly
- Multiple sinks, baths or showers are backing up
- Water appears in another fixture when the toilet is flushed
- Persistent gurgling from drains
- Wastewater backing up into a bath or shower
- An outdoor drain is overflowing
- The blockage returns soon after being cleared
These symptoms can indicate an obstruction further along the property's waste or drainage system.
In that situation, contact a plumber or drainage specialist rather than repeatedly trying to clear the toilet itself.
Why Does My Toilet Keep Blocking?
A toilet that blocks once after too much paper has been flushed isn't necessarily cause for concern.
A toilet that regularly blocks deserves further investigation.
Possible causes include:
- Too much toilet paper is being used
- Wet wipes or other unsuitable products are being flushed
- A foreign object trapped in the toilet
- Restricted waste pipework
- A partial blockage further down the drain
- Problems with the wider drainage system
If you've cleared the toilet several times and the problem keeps returning, consider having the drainage inspected.
Does the Type of Toilet Affect Blockages?
Whether you have a close-coupled toilet, a back-to-wall toilet, or a wall-hung pan, the first response to a straightforward blockage is broadly similar: stop flushing, assess the water level, and try to clear the obstruction with a plunger.
However, toilet designs differ significantly in their cisterns, pipework, installation, and maintenance access.
If you're trying to identify your toilet type or considering replacing an older WC, our Ultimate Toilet Buyer's Guide explains the main designs and the differences between them.
How Do You Unblock a Wall-Hung Toilet?
A straightforward blockage in the bowl or trap of a wall-hung toilet can often be treated much the same way as in a floor-mounted toilet.
Start with:
- A toilet plunger
- Warm water and washing-up liquid for a minor paper blockage
- A toilet auger, if plunging, doesn't work
Where things differ is behind the toilet.
Wall-hung toilets usually use a concealed cistern and supporting frame installed behind the finished wall. If the problem involves the cistern, flush mechanism or installation rather than a simple blockage, access may therefore be different.
If you're unfamiliar with this type of WC, our guide to Wall Hung Toilets: Pros and Cons explains how the concealed design differs from a conventional floor-mounted toilet.
For new installations rather than blockage removal, How to Install a Wall Hung Toilet covers the frame, concealed cistern and installation process in more detail.
When Should I Call a Plumber for a Blocked Toilet?
You don't necessarily need a plumber for a simple toilet-paper blockage.
However, professional help is sensible if:
- Plunging doesn't clear the blockage
- A toilet auger doesn't work
- You suspect a solid object is trapped inside the toilet
- The blockage keeps returning
- Several toilets or drains are affected
- Sewage is backing up elsewhere
- An external drain is overflowing
- You suspect a soil-pipe or drainage problem
- The toilet or nearby pipework is leaking
- You aren't comfortable attempting the work yourself
A plumber or drainage specialist can investigate deeper obstructions that aren't accessible from the toilet bowl.
How to Prevent a Toilet From Blocking Again
Once you've cleared the blockage, a few simple habits can reduce the chances of it happening again.
Only Flush Toilet Paper
Avoid flushing:
- Wet wipes
- Baby wipes
- Sanitary products
- Cotton wool
- Cotton buds
- Paper towels
- Kitchen roll
- Nappies
- Dental floss
Dispose of these products in a bin instead.
Avoid Excessive Toilet Paper
Large quantities of toilet paper can collect in the trap before they have time to break down.
If a particularly large amount needs to be disposed of, avoid trying to flush everything at once.
Keep Objects Away From the Toilet
Small objects and children's toys can easily end up in an open toilet.
Keeping the lid closed when the toilet isn't being used can help prevent accidental blockages.
Deal With Slow Flushing Early
Pay attention if your toilet starts behaving differently.
Water rising higher than normal before draining, slow drainage and frequent gurgling can all indicate a developing restriction.
A partial blockage is generally easier to deal with than a completely blocked toilet.
Other Common Toilet Problems
A blocked toilet isn't the only common WC problem.
If your toilet flushes and drains normally but the seat moves from side to side, the issue is more likely to be the seat fixings than the toilet itself.
Our "How to Tighten a Loose Toilet Seat" guide explains how to identify and tighten various toilet-seat fixing systems.
How to Unblock a Toilet: Quick Checklist
If your toilet is blocked:
- Don't flush it again.
- Wait for the water level to fall.
- Remove excess water if the bowl is close to overflowing.
- Place a toilet plunger firmly over the outlet.
- Plunge repeatedly while maintaining the seal.
- Try warm water and washing-up liquid for a minor paper or waste blockage.
- Use a toilet auger if plunging doesn't work.
- Never pour boiling water into the toilet.
- Never mix cleaning chemicals.
- Call a plumber if the blockage persists or multiple drains are affected.
Blocked Toilet FAQs
What is the quickest way to unblock a toilet?
Using a toilet plunger is usually the quickest first method for clearing a straightforward blockage.
Create a firm seal over the toilet outlet and use repeated push-and-pull movements to loosen the obstruction.
Will a blocked toilet eventually unblock itself?
Sometimes.
A minor blockage caused primarily by toilet paper may soften and break down after sitting in water.
Wet wipes, sanitary products, toys, and other solid objects are unlikely to resolve on their own.
If the water isn't draining normally, don't repeatedly flush the toilet while you wait.
How do you unblock a toilet when the water is high?
Don't flush again.
Wait for the water level to fall and carefully remove some water into a bucket if necessary.
Once there's enough room to work safely, use a toilet plunger to try to clear the obstruction.
How long should I leave washing-up liquid in a blocked toilet?
For a minor blockage, leave the washing-up liquid for approximately 10–20 minutes before carefully adding warm water.
If the blockage doesn't begin to clear, use a plunger.
Can too much toilet paper block a toilet?
Yes.
A large quantity of toilet paper can temporarily lodge in the toilet trap before it has enough time to break down.
This is one type of blockage that may respond particularly well to plunging.
Why does my toilet fill with water and then slowly drain?
This commonly indicates a partial blockage.
Water is still getting past the obstruction, but not at the normal rate.
Avoid repeatedly flushing and try clearing the restriction with a plunger.
Why is my toilet gurgling?
Gurgling can occur as air moves through the waste pipe.
Persistent gurgling combined with slow drainage, unpleasant odours, or problems with other bathroom fixtures can indicate a broader drainage issue that needs investigation.
Can wet wipes block a toilet?
Yes.
Wet wipes don't generally break down in water as quickly as conventional toilet paper and can contribute to serious drainage blockages.
Disposing of them in a bin instead of flushing them reduces the risk.
Should I flush immediately after plunging?
It's safer to test the toilet first.
Once the blockage appears to have cleared, pour a modest amount of clean water into the bowl and check that it drains freely.
You can then perform a normal flush while watching the water level.
What should I do if something has fallen down the toilet?
If you can clearly see and safely retrieve the object while wearing gloves, remove it rather than flushing.
If it has moved around the toilet trap, a toilet auger may be able to retrieve it.
If the object is firmly lodged or can't be reached, contact a plumber rather than trying to force it further into the waste pipe.
Do I need a new toilet if mine keeps blocking?
Not necessarily.
Recurring blockages can be caused by the waste pipe or wider drainage system rather than the toilet itself.
Have persistent problems investigated before assuming that replacing the toilet will solve them.
Need a New Toilet?
Most toilet blockages can be resolved without replacing the WC.
However, if you're renovating your bathroom, replacing damaged sanitaryware or upgrading an older bathroom suite, you may decide that it's a good opportunity to replace the toilet at the same time.
Explore the Asturias Bathrooms range of toilets, including close-coupled, back-to-wall and wall-hung designs.
