Why Did My Toilet Tank Crack?

We’ve all been there. You go to flush your toilet, and suddenly, your worst nightmare comes true—the tank cracks.

Now, you’re left with a big mess and a big question: why did this happen? Why did my toilet tank crack?

Read on to find out the answer, as well as some tips on how to avoid it in the future.

Why Did My Toilet Tank Crack

Why Did My Toilet Tank Crack?

There are a few reasons why your toilet tank may have cracked. The most common reason is that the water pressure in your home is too high. When water pressure is too high, it puts stress on the tank, which can eventually lead to cracking.

Toilet tanks are typically made out of porcelain, which is a type of ceramic that is both strong and durable. That being said, porcelain can still crack under the right circumstances. For example, if your toilet tank is hit with a blunt object (like a rock or a toy), it could crack. 

Another possible reason for a cracked toilet tank is that the tank itself is old and has become brittle over time. If you have an old toilet, it’s important to check the condition of the tank regularly and be on the lookout for any cracks.

Finally, sometimes toilets crack due to manufacturing defects. If your toilet is relatively new and you didn’t do anything to cause the crack, you may be able to get a replacement from the manufacturer.

Can I Fix a Cracked Toilet Tank?

Fortunately, fixing a cracked toilet tank is usually pretty easy. If the crack is small, you might be able to repair it with some waterproof epoxy putty or aquarium sealant.

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If the crack is bigger, you might need to replace the entire tank. Replacing just the tank lid is usually not enough because cracks tend to spread quickly. In either case, it’s always best to consult a professional before attempting any repairs on your own.

How Can I Prevent My Toilet Tank from Cracking?

The best way to prevent your toilet tank from cracking is to reduce the water pressure in your home if it’s too high.

You can do this by installing a pressure-reducing valve. Another way to reduce stress on your toilet tank is to install a foam or rubber Tank Saver Pad, which will act as a cushion between the tank and the bowl in case of an impact.

Finally, make sure you regularly check your toilet for any cracks or other damage so you can address the issue before it becomes a bigger problem.

Is It Common for A Toilet Tank to Crack?

Unfortunately, yes. Toilets are made of porcelain, which is a relatively fragile material. So, when a toilet is dropped or banged hard against something, the tank can easily crack.

If you’ve just cracked your toilet tank, don’t panic—this is a very common problem. There are affordable ways to have it fixed, so you can have your toilet back up and running in no time. Just be careful when putting the lid back on in the future!


A cracked toilet tank is every homeowner’s nightmare. But don’t worry—we’re here to help. In this blog post, we answered the question “Why did my toilet tank crack?” and shared some tips on how to prevent it from happening in the future.

So the next time you flush your toilet, you can do so with confidence, knowing how to repair and prevent a cracked toilet tank.