What causes the inside of a toilet bowl to crack?

Author: Prof. Frankie Block MD  |  Last update: Wednesday, July 8, 2026

Heavy impact: Sharp or blunt force impacts of something hard on the toilet bowl can cause cracks to form.

Why is the inside of my toilet cracking?

Toilets can crack for various reasons, including manufacturing defects, age-related wear, or sudden temperature changes. The specific cause may be hard to determine without a thorough inspection.

Can a toilet bowl crack on its own?

If it had been an older American Standard Cadet, it would have been a somewhat common thing for it to happen. YES, they do crack spontaneously, and while there can be several different reasons for it, the actual cause MIGHT be able to be determined by seeing where and how the crack occured, but even that would be iffy.

What is the average life expectancy of a toilet?

On average, most toilets will have a lifespan of between 10 and 15 years, even with regular use. The lifespan may vary depending on the toilet model and the wear and tear it experiences over the years. Most toilets will start to give you warning signs indicating the time for replacement is near.

How to fix a crack in a toilet bowl?

Fill the crack with plumbers putty, flex glue, aboweld 55-22, or some other waterproof adhesive rated for porcelain and let it dry. This should be a temporary measure until you can find a replacement tank or replace the entire toilet. Replace it as soon as you can afford to.

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What would cause a porcelain toilet to crack?

Old age: Toilets become vulnerable to cracking with old age, so you should be sure to get a routine inspection if it is nearing the end of its lifespan. Heavy impact: Sharp or blunt force impacts of something hard on the toilet bowl can cause cracks to form.

How much does it cost to fix a cracked toilet?

Repairing a toilet has an average cost of $60 to $200, while the replacement price is between $400 and $800. Replacing a toilet has an added fee of $25 to $100 for removing the old fixture. Usually, a part of the toilet deteriorates over time and requires either repair or replacement, a quick and easy fix.

How long does the inside of a toilet last?

The average homeowner typically replaces their toilet every 10 to 15 years. However, when properly cared for, a toilet can last up to 50 years or longer. Toilets usually show signs that they need a repair or replacement, but some reach the end of their lifespan with little or no physical signs.

How much does a plumber charge to replace a toilet?

Replacing a toilet costs between $275 and $480 in most cases, and the average cost sits around $375.

How to tell if a toilet needs to be replaced?

If you think that it might be time for you to replace your toilet, here are the warning signs that you should keep an eye out for.
  1. Consistently Clogging. ...
  2. The Bowl or Tank Are Cracked. ...
  3. You've Noticed a Spike in Your Water Bill. ...
  4. The Toilet Moves When You Sit on It. ...
  5. It Needs Too Many Repairs. ...
  6. Visual Scratches. ...
  7. Faulty Flushing.

Should I replace a cracked toilet?

If there are any cracks inside the bowl, the whole toilet must be replaced. This is because the bowl bears all of the weight of not just the toilet, but anyone using it. This could cause serious injury and damage to the bathroom if it's not replaced. A qualified plumber can replace the toilet easily.

Will boiling water crack a toilet bowl?

While it is okay to pour boiling water down sink drains, you should never use boiling water in your toilet, as the heat can cause the porcelain to crack. Instead, run your tub until the water is hot and fill a good-sized stockpot or bucket with it. Then, pour the hot water into the toilet bowl from about waist height.

Will porcelain toilet crack in cold?

Water freezing in toilet bowls can crack the porcelain. Ice formation in water heaters will ruin its internal mechanisms. Proper winterizing prevents these inconvenient and costly problems.

Are hairline cracks in the toilet bowl bad?

External hairline cracks are frequently cosmetic and can be repaired by sealing them with plumbing epoxy. Cracks on the bowl's interior are cause for concern and may require replacing your toilet.

How do you fix a crack in a toilet pipe?

How to seal a leaking waste pipe
  1. Rubber or silicone repair tape. Rubber and silicone tape fuses to itself, so it's easy to take off and replace later. ...
  2. Epoxy putty. If you need a quick fix for a leak in a joint, it's better to use epoxy putty. ...
  3. Pipe repair clamps.

Can a cracked toilet cause a leak?

A leaking toilet might be a cracked toilet. A cracked toilet can be a homeowner's worst nightmare, causing water leaks, potential damage to the bathroom floor and even costly repairs if not addressed promptly. Additionally, it could lead to gross smells, germs and bacteria leaking out of the toilet.

Is it cheaper to fix a toilet or replace it?

Some problems require expensive, complicated repairs. If you encounter these issues frequently, scheduling a replacement will most likely be the most cost-effective solution, as you can save money.

How often should toilets be replaced?

Like we mentioned, a toilet does have a lifespan. While they can last a very long time, it depends entirely on the owner's maintenance. On average, toilets can last up to 50 years if they are properly maintained. But, the rule of thumb is to replace your toilet every 25 years, due to damage and regular wear and tear.

What do most plumbers charge per hour?

The average plumbing contractor hourly rate will greatly depend on the level of expertise you're hiring.
  • Master plumber: $90 to $200 per hour.
  • Journeyman plumber: $70 to $120 per hour.
  • Apprentice plumber: $45 to $90 per hour.

How to tell if your toilet is porcelain or ceramic?

You can tell whether your toilets are porcelain or ceramic by looking at its edge. Ceramic toilets usually have a glaze on top of the surface. While porcelain can be glazed, it's usually not.

What is the most common toilet repair?

One of the most common toilet issues is a toilet that continues to run after flushing. This can lead to wasted water and higher bills. To address this problem, you can check the flapper valve and the fill valve. If the flapper is worn or misaligned, replace it.

Is a cracked toilet covered by insurance?

Generally, buildings accidental damage cover will cover unexpected and accidental damage to the property itself. This could include broken windows and doors, damaged toilet facilities, such as a broken sink, split cables, blocked pipes or septic tanks and broken locks.

What's the average cost of a new toilet?

A new toilet costs $375–$500 on average, but prices can range as low as $125 for a basic toilet or as high as $2,000 for one with a smart, touchless flush system. The more features a toilet has, the more it costs. It's also cheaper to replace a toilet than to install one in an entirely new bathroom.

What can I use to fix a crack in my toilet bowl?

Flex Seal, the brand name of a rubberized waterproof sealant, can fix a cracked toilet tank or bowl. Do not use Flex Seal to fix a pressure-assisted toilet.

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