Why is my toilet leaking at the base and how can I solve it now? (2023)

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Why is my toilet leaking at the base and how can I solve it now? (1)

If water accumulates regularlyyour toilet, that could be a bad sign. It is very likely that your toilet is leaking at the base. Does it happen when you flush your toilet? If so, you need to fix this leak before it turns your bathroom into an indoor pool!

The leak at the bottom of the toilet usually occurs when the gasket wears out and fails. That can happen sooner or later. A toilet can last more than 30 years with minimal care.

However, if for some reason the seal under the toilet fails, water will begin to leak and splash onto the floor. This can cause structural damage and wreak havoc in your bathroom.

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Fortunately, this type of leak is not difficult to identify and repair. In most cases, all you have to do to fix this problem is replace the wax ring and tighten your toilet's T-bolts.

Easier said than done, especially if you're new to toilet plumbing. Don't worry, we'll help you fix a leaking toilet.

In this article, we will give you a step-by-step guide on how to fix your leaky toilet after flushing. You'll learn how to install a flexible water supply hose, apply a toilet wax seal, tighten T-bolts, make a watertight seal, and more.

Ready to start? Let's examine in a little more detail why this is happening.

contents

  • Why is my toilet leaking around the base and how can you fix it?
    • Loose T-bolts
    • Damaged wax ring
  • How to fix a leaking toilet floor
    • Locate the problem
    • Tighten the T-bolts
    • Replace a wax ring
    • Seal your toilet
  • Toilets where leaks can occur

Why is my toilet leaking around the base and how can you fix it?

Before proceeding with the toilet repair, you should understand exactly why your toilet is leaking.

As we mentioned earlier this can be due to loose T-bolts or a damaged wax ring which can cause the seal to fail.

Loose T-bolts

Why is my toilet leaking at the base and how can I solve it now? (2)You may have noticed plastic caps on the toilet floor. These caps cover T-bolts that hold the toilet securely in place.

If the T-bolts become damaged or loosen, your toilet's seal will rupture and cause leaks.

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You'll need to reposition your toilet slightly - by leveling and centering it - before you start tightening the T-bolts. If they are broken or spin freely, you need to buy a new replacement set.

Damaged wax ring

Why is my toilet leaking at the base and how can I solve it now? (3)If water continues to seep out of the bottom of your toilet after tightening the T-bolts, there is a good chance that the wax ring is the source of the problem.

The wax ring tends to get damaged over time which can cause your toilet to leak at the base.

Be sure to replace the damaged wax ring as soon as possible. In the meantime, avoid using the toilet if possible.

The dirty water leaking from your toilet makes your bathroom an unhealthy place. In addition, it can damage the flooring, sub-floor and ceiling under the toilet if left untreated.

How to fix a leaking toilet floor

Now that you know what can cause your toilet to leak at the base, it's time to look at how to fix a leaking toilet. Without further ado, let's get into that.

Locate the problem

Why is my toilet leaking at the base and how can I solve it now? (4)First you should find the problem and identify the cause of the leakage.

Water buildup on the toilet floor usually indicates that your toilet's wax seal has failed. But sometimes the problem lies elsewhere.

Water on the floor can also come from other leaking parts of your toilet. That's why you need to check if it's coming from the bottom of your toilet. So how to localize the problem?

Use a sponge to soak up the water around the toilet and dry with a rag or towel. If a puddle forms on the floor again, take a closer look to see where the water is seeping out. Make sure it's not coming from a sweaty bowl, a cracked tank, loose supply hoses, or faulty shut-off valves.

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If water leaks from the toilet base, simply tighten the screws that attach your toilet to the floor. Unscrew the caps covering the screws with a flathead screwdriver or spatula.

Then gradually tighten each screw alternately with a wrench. The leak will stop if you are lucky. However, if it didn't help, you will need to replace your wax seal.

Tighten the T-bolts

Why is my toilet leaking at the base and how can I solve it now? (5)

Once you've located the problem and verified that water is leaking from the bottom of your toilet, you need to fix the source of the leak. Check that your toilet is firmly bolted to the floor.

If it comes off, the wax ring will not provide the proper seal and your toilet will start leaking at the base.

The T-bolts are used to securely attach your toilet to the floor. You should tighten these screws to stop the leak unless the problem is in a wax ring. Here's how it works in a few simple steps:

  • Make sure your toilet is positioned correctly.
  • Remove the plastic caps from the screws.
  • Tighten the T-bolts with an adjustable wrench to keep your toilet securely attached.

You will need to replace the anchor bolts if they spin freely or have frozen. It won't be a difficult task if your toilet is already removed. On older toilets, be careful not to damage the T-bolts when removing the rusted nuts.

Replace a wax ring

When the toilet seal is broken, it is important to replace a broken wax ring to prevent a toilet from leaking around the base.

This isn't expensive damage as the wax rings only cost a few dollars. However, it is a time-consuming repair that can take a few hours. Basically, this job involves removing and replacing the toilet.

Here is a step-by-step guide to replacing the old wax ring:

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  • Step 1:Before replacing a wax ring, you must loosen the nut on the shut-off valve. This valve is usually placed in the basement or behind the toilet. Simply turn the handle clockwise to turn off your water supply.
  • Step 2:Drain the sedentary water from the tank by holding down the handle and flushing your toilet. You should also loosen the nut holding the valve in place to remove any residual water at the bottom of your toilet.
  • Step 3:Now you can unscrew your water supply to raise your toilet off the ground. This includes some minor operations like prying open the screw caps, removing the t-nuts and breaking the wax seal.
  • Step 4:Remove the toilet from the floor and carefully lay it on its side. You can put it on a cardboard box or blanket.
  • Step 5:Remove the defective wax seal. Clean the wax ring with a spatula. Make sure there is no residue or dry wax on the flange and bottom of your toilet.
  • Step 6:Replace corroded T-bolts if present. Also replace the entire flange if it is bent or cracked. You can also fill the gap with crescent-shaped repair tape (a cheaper but less reliable solution).
  • Step 7:Attach a new wax ring by placing it over the cabinet flange. Make sure the wax seal is properly centered before repositioning the toilet.
  • Step 8:Install your toilet in its primary position. Press it into the wax ring with your body weight to create an airtight seal. You should consider replacing your toilet with a new one if it has chrome plated copper pipe.
  • Step 9:Tighten the toilet screws and turn on the water supply by opening the shut-off valve.
  • Step 10:Finally, check the bottom of your toilet for leaks. Flush it several times and check if the seal is leaking. If you notice a puddle, try pressing on the toilet bowl. Tighten the nuts a little more. Before sealing the toilet, you should wait a few days to make sure the leakage problem is really solved.

Seal your toilet

Why is my toilet leaking at the base and how can I solve it now? (6)It should be noted that caulking is not a solution for toilets that leak at the bottom.

Instead, the aim is to prevent various sources from reaching the toilet floor.

Once the water is trapped under the base, it can cause odors and mold.

Caulking can make it easier for you to clean the water by keeping it on the ground.

This is a double-edged sword. While caulk can prevent the spread of bacteria, it will hide any leaks. Some homeowners are required by building codes in some communities to caulk their toilets.

If you decide to caulk your toilet, or if you are required to do so, it's wise to use a mildew-resistant, high-quality caulk.

Be sure to fix the leaking floor before caulking the toilet. Do not lift the tank whenRemove your toilet.

Toilets where leaks can occur

  • Compact toilets
  • 10 inches rough in toilets
  • Dual flush toilets
  • Comfort level toilets
  • Macerating toilets

A leaking toilet will not only cause mold to grow in your bathroom, it will also increase your water bill. Because of this, you should fix any leak around your toilet quickly.

While many people can fix a leaking toilet base themselves, it's best to call a professional local plumber. Aside from saving you time by doing the repairs for you, it will ensure the job is done properly.

If you're a do-it-yourselfer or looking to save on toilet repairs, read our guide again. This problem really only occurs on domestic toilet models, doesn't itportable camping toilets.

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Whether you just need to tighten T-bolts or replace that old wax ring, take the time to examine each step. Worth it.

FAQs

Is toilet leaking at bottom an emergency? ›

When your toilet leaks at the base, this will lead to water buildup and eventually water damage. That's when a leaking toilet becomes an emergency.

How much does it cost to fix a toilet leak at the base? ›

What's the price range for a typical toilet leak? Expect to pay $150-$500 USD—but likely closer to $150-$175. In the U.S., the average plumbing repair costs a bit over $300 USD, but that includes repairs that are more complex than most toilet leaks.

What are common toilet leaks? ›

The most common toilet leak is caused by a deteriorated flush valve (flapper) at the bottom of the toilet tank. If the flapper does not seat properly, water will leak into the toilet bowl. Often this leak will occur without being heard.

How often does the seal around the base of a toilet need replacing? ›

The wax keeps water from leaking as it passes from the toilet to the drain pipe. It also seals against foul sewer gas odors. A wax seal will often last the life of the toilet, 20 or 30 years, without needing to be changed.

Does a leaking toilet need to be replaced? ›

Some cracks and leaks can be safely repaired without replacing the entire toilet, but it's better to be safe than sorry. If you have a crack in your toilet that's actively leaking, you should get it replaced immediately. If your toilet does enough water damage, it could wind up crashing through the bathroom floor.

How long do toilets last before leaking? ›

Share: Toilets can last for up to 50 years under average conditions. However, this doesn't mean that you won't need to spend money maintaining it throughout its useful life. Furthermore, there are many factors that could cause your toilet to fail in less than 50 years.

What is the best sealant for toilet base? ›

Choose 100% silicone caulk.

Caulk usually comes in a tube and 100% silicone caulk is best for use on a toilet since it's more resistant to water than other types of caulk, such as acrylic.

What causes a toilet bowl to leak at the base? ›

When a toilet leaks at the base, with water pooling on your bathroom floor, it's typically due to the failure of the wax gasket that seals the toilet to the floor. This seal should make a watertight connection between the toilet and floor. A leak often means that the wax seal may need to be replaced.

Is it OK to seal around the base of a toilet? ›

It's actually required by the International Plumbing Code to caulk a toilet to the floor, and now knowing the reasoning behind it, why would you not want to? It helps to create safety in the bathroom and even provides sanitary protection.

How much does it cost for a plumber to replace a toilet flange? ›

If your toilet is creaking or wobbling, you may need to replace the flange. For a plumber, replacing a toilet flange is a quick and easy job. Replacing a toilet flange costs $145 to $165 on average.

Why is my toilet leaking all of a sudden? ›

The most likely culprits are the drain line, wax ring, flange bolts, cracks, or water supply line. You can replace a wax ring on a toilet, or you can call in a pro for the job. A pro may recommend replacing parts or the entire toilet. Leaks can lead to expensive water bills and repairs, so quickly investigate.

How do I know if I need to replace toilet flapper? ›

Replacing a Worn-Out Toilet Flapper

To test your flapper's performance, put a few drops of food coloring into the tank water. Don't flush the toilet. If after 30 minutes you find colored water in the toilet bowl, replace the flapper yourself or call a plumber to do the job for you.

How much does it cost to reseal a toilet? ›

The most common place for a toilet to leak is at the wax seal. Replacing a wax seal may be as cheap as $50. Other common leak points are the tank and bowl which may cost $300 or more to repair.

Can a toilet wax ring cause a leak? ›

If the closet flange cracks and causes the toilet to become unstable, the rocking movement can also break the wax ring. When this occurs, water will leak from the base of the toilet and often through the ceiling below. Improper installation practices are typically the reason for this type of failure.

How much does it cost to replace seal around a toilet? ›

It can vary depending on your location and how quickly you need it. $90-$120 is a good ballpark. If you are having other plumbing work done, they might do it cheaper, and if they have a large travel fee, you may pay closer to $150.

What is the most common toilet leak? ›

The most common toilet leak is caused by a deteriorated flush valve (flapper) at the bottom of the toilet tank. If the flapper does not seat properly, water will leak into the toilet bowl. Often this leak will occur without being heard.

How do you seal a gap between toilet and floor? ›

Remove the toilet and turn it on its side. Measure the depth and width of the gluing edge of the bowl. Next, move your caulk gun to the inset depth you just measured and apply caulk directly to the floor, maintaining the inset depth as you follow the tape. Install the wax ring and lower the toilet onto the flange.

What is the seal at the base of a toilet called? ›

Wax Ring - The yellowish beeswax (or beeswax type material) ring between the bottom of your toilet bowl and the mating closet-ring (flange). It is "donut" shaped, about 1 inch thick. A seal is achieved when the wax ring is squeezed between the bottom of your toilet bowl and the top of the closet-ring.

Should you grout or caulk around a toilet? ›

You should absolutely caulk around the base of the toilet for hygienic and cosmetic reasons.

How long does a toilet wax ring last? ›

The short answer is, indefinitely. Wax, unlike rubber, doesn't deteriorate. Unless there's another problem with the toilet, it won't spring a leak on its own. People usually replace wax rings when they remove the toilet for some unrelated reason.

What do you put around the base of a toilet? ›

Caulk prevents a fouling area. If mop water, bathtub water, or a less pleasant “bathroom liquid” gets underneath the toilet, there is no way to clean it up. Caulking around the base of the toilet will prevent this from happening.

Is wax ring better than wax free? ›

So, which is better? It all comes down to your personal preference. If you feel more comfortable using something tried and true, stick to a wax ring. For a newer mess-free approach, wax-free toilet seals are the way to go.

How do I know if my toilet is sealed properly? ›

With the toilet removed, you can see the toilet flange and measure its height above the floor. The optimum flange height to aim for is 1/4 inch above the finished floor. This typically allows for almost any type of wax ring to be used and still ensure a good seal.

How do I know if my toilet flange is damaged? ›

A broken flange will cause the toilet to move because it is no longer secured to the flange, which is anchored to the subfloor. The constant rocking will likely break the wax seal (located between the toilet and the flange), allowing water to leak onto the substrate and the ceiling below when the toilet is flushed.

Do you need a plumber to replace a toilet flange? ›

If the flange is metal or glued to the drain pipe and cannot lift out once the bolts are removed, call a licensed plumber to remove it for you. Trying to remove a flange that is sealed to the pipe yourself could damage the drain pipe.

Can you put a new toilet flange over an old one? ›

Can you put a new toilet flange over an old one? A standard toilet flange should fit snugly into the outflow pipe and sit level with the subfloor. Installing a new one without first removing the old one will make it impossible to form a seal and keep the toilet bowl bolted securely in place.

Do you put sealant around base of toilet? ›

It's actually required by the International Plumbing Code to caulk a toilet to the floor, and now knowing the reasoning behind it, why would you not want to? It helps to create safety in the bathroom and even provides sanitary protection.

How do you fix a leaking toilet wax ring? ›

10 Steps to Replace a Wax Ring
  1. Step 1: Shut Off Water Supply. ...
  2. Step 2: Flush the Toilet Water Out. ...
  3. Step 3: Unscrew T-Bolts. ...
  4. Step 4: Remove the Toilet. ...
  5. Step 5: Scrape Off Previous Wax Ring. ...
  6. Step 6: Slide New Bolts Into Flange. ...
  7. Step 7: Place New Wax Ring On. ...
  8. Step 8: Reset the Toilet.
Jul 17, 2020

Why would a toilet leak at the base? ›

When a toilet leaks at the base, with water pooling on your bathroom floor, it's typically due to the failure of the wax gasket that seals the toilet to the floor. This seal should make a watertight connection between the toilet and floor. A leak often means that the wax seal may need to be replaced.

How long do toilet wax rings last? ›

The short answer is, indefinitely. Wax, unlike rubber, doesn't deteriorate. Unless there's another problem with the toilet, it won't spring a leak on its own. People usually replace wax rings when they remove the toilet for some unrelated reason.

How do you replace the bottom seal on a toilet? ›

How to Replace a Tank-to-Bowl Gasket
  1. Shut Off the Water. Turn off the water to the toilet and flush it. ...
  2. Disconnect the Supply Hose. Disconnect the water supply hose from the tank. ...
  3. Locate the Tank Screws. ...
  4. Remove the Screws. ...
  5. Remove the Rubber Gasket. ...
  6. Install a New Gasket. ...
  7. Replace the Screws. ...
  8. Tighten the Nuts.

How do I know if my wax seal is broken? ›

The telltale sign of wax ring failure is water leaking out from around the base of the toilet. You might also notice a toilet feeling unusually wobbly if the wax ring is coming loose.

What happens if you don't replace wax ring on toilet? ›

If the wax ring isn't sealed correctly, it can cause wastewater to leak from the bottom. Leaking water can lead to mold around the floor. A poorly sealed wax ring can also cause foul odors to stink up your bathroom. If you smell sewage or see water leaking, then you may need a new wax ring.

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