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One of the worst things to come across is a toilet leaking from its base.

A leaking toilet can quickly be frustrating as the water may flood your bathroom floor. And it is far from ideal to keep using the toilet in such an unhygienic situation.

So, it’s best to address the problem immediately for an easy resolution. But, many people either find out about the leak later or choose to ignore it. It can also be challenging to explain the leak to a professional plumber.

So, we prepared this handy guide to help you know more about the problem. We have even added some possible DIY solutions to fix the issue.

Let’s find out why your toilet is leaking at the base!

Causes Of A Leaking Toilet Base

Toilet Leaking Hardwood Floor

There can be several reasons why the base of your toilet develops a leak. Note that the leak might be hard to notice in some instances. And, in bathrooms with a shower area adjacent to the toilet, people can mistake the accumulated water for a leak.

So, before finding out the reason behind the leak, ensure that it’s a leak rather than stagnant water. In any case, the situation isn’t desirable, and you may require a better drainage system. Similarly, poor ventilation systems can lead to water collecting on the floor.

It would help if you were careful about these problems, as stagnant water in a bathroom can damage the flooring. It may also lead to the growth of mould, which could have severe health implications. And unfortunately, a bathroom exhaust fan can only do so much. So, if you find these to be the problem behind the water on the bathroom floor, contact a plumber immediately. If you can, turn off the main shutoff valve to stop water wastage from your leaky toilet whilst waiting for a professional.

Now, let’s move on to some common causes of a leaking toilet base.

1. A Loosely-Attached Toilet

A typical reason behind a leaking toilet base is improper installation. As you might know, the toilet is usually attached to the floor with bolts on a closet flange made of metal or plastic. And the plastic closet flange sits on top of the sewer drain pipe.

The bolts might have loosened if you had used the toilet for a few years. But, it may also be due to hurried installation where the bolts failed to attach completely to the closet flange. The bolts may even loosen due to other factors, like the wax seal falling apart.

You can check the toilet to see if there are any loose parts. You can also speak with your local plumber about reinstalling the toilet correctly.

2. Broken Wax Seal

Often, we don’t pay attention to toilet installations, and very few people know how the system works. And, if it’s your first time experiencing a leaking toilet, issues like a broken wax seal may evade your attention.

A broken watertight seal is one of the most widespread reasons your toilet leaks at the base. This seal sits between the bottom of a toilet and the closet flange to ensure that dirty water can’t escape your toilet.

Since this problem frequently occurs in most homes, most plumbers can pull out the toilet to reinstall a fresh wax seal or a silicone ring. If you’re doing it on your own, clean the closet flange properly to ensure the seal and wax ring are tight. You will also need a screwdriver or putty knife for this.

It is also worth noting that most of us habitually clean toilet bowls with heavy chemicals in our homes to eliminate germs and bacteria. In reality, it’s detrimental to the wax seal and can lead to its breakage. So, if you have a toilet with a broken wax seal, consider using milder cleaning agents after it’s installing a new wax ring.

Wax Seal Broken Toilet

3. A Loose Connection Between The Toilet Bowl And Toilet Tank

Interestingly, you can trace a toilet leak from the base to the mack washer connecting the tank to the bowl rim. As the water drips and collects at the bottom, you may think the toilet leaks from the base. Note that this problem doesn’t exist in toilets where the toilet tank and bowl come pre-attached as one piece.

Such a leak might be due to problems like a loose bolt or a cracked O-ring gasket. Even though tightening the toilet bolts may fix the problem, a gasket would need to be changed to stop the leaking water. In any case, it’s best to hire a professional plumber who is trained to give you the right solution and can detect leaks with the right equipment.

4. A Loose Water Supply Line

Although uncommon, another reason for a leak near the toilet base might be a faulty water supply line. Fortunately, it’s easy to diagnose this issue. That said, your toilet would always leak instead of leaking when you flush in the case of a damaged water supply line.

To fix this issue, you must ensure that the connection bolts are tight and in good condition. If you have called in a plumber, remember to turn off the main water supply valve to stop the water from flooding your bathroom.

Toilet Water Supply Line

Fixing Your Leaking Toilet Base

That’s everything we had to tell you about the reasons behind a leak at the base of your toilet. Toilets leak for many different reasons, but if there is water pooling on your floor - you need to have it fixed! Remember to diagnose the issue properly, and if you’re confused, reach out to us. Our team are happy to help fix a leaking toilet base!

And since a leaking toilet creates an unhygienic situation, properly cleaning up afterwards is essential. Cleaning will include disinfecting the area around your toilet and bathroom floor. We also recommend you mop the floor with bleach to eliminate germs.

With that, we have reached the end of this guide. Until next time!

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