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Wall-Mounted Toilet Problems And How To Fix Them

Note: This post may contain affiliate links. This means that at no cost to you, we may receive a small commission for made purchases.

Having a wall-mounted toilet is very popular for a modern bathroom as they look clean and tidy, and they are off the floor.

They are extremely popular for those who want their bathrooms to look as modern as possible, but they can also have a few issues that need fixing as soon as you recognize them. 

Wall-mounted toilets can have some problems that require fixing, but there are some problems that you can try to fix yourself.

You can try to fix the problem yourself as some issues with these toilets are a lot easier to fix than you think. 

This article will show you the common problems that wall-mounted toilets (see also ‘How To Install A Wall Mounted Toilet – An Easy To Follow Step By Step Guide‘) can have and how to fix them.

You can find out more about how to fix these problems below and make sure that your toilet is working perfectly and isn’t out of action for too long!

What Is A Wall-Mounted Toilet? 

A wall-mounted toilet is a toilet that has been designed to not take up as much room in the bathroom as a traditional toilet (see also ‘7 Best Corner Toilets For Small Bathrooms‘).

When you look at a wall-mounted toilet, you will see that only the seat and the flush are in view.

This is because the tank is built into the wall behind the toilet. 

To have a wall-mounted toilet, the toilet tank and the wall need to be built specially to make sure that it all fits and works.

Without this, the toilet will not work properly, so a professional needs to install the wall-mounted toilet for a clean and professional finishing look.

They will also make sure that the plumbing is done correctly for a working toilet. 

What Are Common Wall-Mounted Toilet Problems?

Three main problems can occur with your wall-mounted toilet.

These problems are when water is leaking into the wall, the water is still running after flushing, and the toilet loosens from the wall over time.

Most of the time, these problems can be solved without the need of calling out a professional, but it is advised that you do if you are unsure or if the problem is still there. 

Leaking Into The Wall

Wall-Mounted Toilet Problems And How To Fix Them?

When you notice that there is water that is leaking into the wall after you are flushing the toilet, you need to address the problem quickly to make sure that it doesn’t worsen.

If this problem is left for too long, there is a risk that the leaks will affect the structure of your house, so it is important not to leave this issue for too long. 

This problem is probably the most difficult to solve yourself, but it can still be done.

As leaks can come from lots of different places, it is important to make sure that you find the exact place that the leak is coming from so you can stop it. 

The Solutions

Firstly, you need to turn off the water while you are fixing where the leak is coming from.

This will stop more water from leaking onto the floor while you are trying to fix the issue.

Slanted Toilet

You need to make sure that the bowl for the toilet is installed correctly, as if it is tilted or slanted, this could be causing the leak.

If you do notice that that toilet bowl is slanted, you can try tightening the screws to see if that helps reposition the toilet back to normal. 

This can help to stop the leaks if this is the problem, so tighten the screws to stop the leak from happening.

If this doesn’t seem to stop the leaks, you will have to investigate further to see what is causing the leaks and how you can stop them. 

Check For Cracks

You also need to check the entire toilet for any cracks that have formed.

If there are any cracks in the toilet bowl, you will need to get a new one straight away.

Make sure that you check the exterior and interior of the toilet for cracks and replace the bowl if you notice any. 

Wall-Mounted Toilet Problems And How To Fix Them?

If you cannot tell if there are any cracks, you can use color drops to highlight the cracks in the bowl.

Cracks are not always visible, so using this method can make them clearer. 

Poor Wax Seal

If the wax seal of the drain is not good enough, water can easily leak out.

When you are checking the toilet bowl, see if the wax seal is damaged or weak and replace it if necessary. You can do this by removing the old wax and installing a new seal. 

Water Still Running After Flushing

When you flush the toilet, the water is only supposed to run for a short time to make sure that the toilet bowl is clean.

However, there can be a problem where the water keeps on running after you have flushed, which needs to be sorted as soon as it is spotted. 

There can be lots of different reasons why the water is still running after you flush the toilet, but it can be very easy to fix.

It will require you to look at the parts inside the water tank, so make sure that you do not knock anything out of place.

The Solutions

The reasons that this could be happening to your toilet are possibly down to water damage, water waste, or improper flushing.

It is more simple than you think to fix these problems, but how?

Firstly, you need to lift the cover of the tank inside the wall and unscrew the ballock and the float inside the tank.

You can then adjust the height of both the ballock and the float to make sure that no water runs through them.

You can then tighten the screws and check if that has helped the problem.

If it hasn’t helped and the water is still running, this is an indication that the ballock and the float need replacing.

You can find these parts at your local store and you can then install them at home.

It is recommended that you unscrew the ballock and the float to take to the store to make sure that you get the right size. 

Toilet Loose From The Wall

When you are sitting on a wall-mounted toilet, it is obvious when it is unstable and feels too loose as you feel like it is going to fall off the wall.

It is important to fix this problem before the toilet does end up falling off the wall and causing damage not only to the toilet but to your bathroom as well. 

The main reason for your toilet becoming loose is due to the installation of the toilet onto the wall.

The toilet could end up broken, water could end up leaking, or bacteria could end up spreading if this problem isn’t fixed as it could worsen and become more challenging to fix. 

The Solutions

Wall-Mounted Toilet Problems And How To Fix Them?

The only way to effectively fix this problem is to reinstall the toilet onto the wall to make sure that it is secure.

You might be able to install the toilet on your own, but you should call a plumber if you are unsure to prevent there from being any damage to your toilet or your bathroom in the process. 

You should always call a plumber if you are unsure how to fix the problem as trying to install the toilet when you are not a professional can cause more problems than it fixes.

They can help to install the toilet properly and make sure that the toilet is not loose or hanging off the wall without being secure. 

It is also important to be aware that wall-mounted toilets often have a weight limit.

As the toilet is held by the wall, it cannot hold as much weight as a traditional toilet.

You can find out the weight limit of your toilet by checking with the manufacturer, but it is important to make sure that the weight limit is not exceeded as this can cause the toilet to become loose. 

Final Thoughts

To conclude, there are a few different problems that can occur with your wall-mounted toilet, but they can be fixed by yourself if you are careful.

It is advised that if you are not comfortable fixing the problems yourself, then you should call a professional plumber.

They will be able to fix the problem and make sure that there is no damage to your bathroom or toilet.

author avatar
Anthony Barnes
Anthony Barnes is the founder of Water Heater Hub and a second-generation plumber by profession. Before developing Water Heater Hub, Anthony Barnes was a full-time plumber, and he has undertaken a wide variety of projects over the decades. As a second-generation plumber, it was easy for Anthony to get used to the technicalities of all from a tender age


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