Repairing Guides

how to repair cracked toilet tank

by Waldo Hegmann DVM Published 3 years ago Updated 2 years ago
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How to Fix a Cracked Toilet Tank

  1. Turn Off the Water First thing’s first, turn the water off so that no more water can go into the tank. ...
  2. Seal the Crack Next, you need to find the appropriate epoxy that is waterproof and made for porcelain or ceramic toilets. ...
  3. Smooth the Epoxy and Let It Dry

How to repair a hairline crack
  1. Drain the toilet tank. ...
  2. Dry out the tank with a cloth or a towel. ...
  3. Fill the crack with the putty or epoxy. ...
  4. Leave the epoxy to dry out for at least 24 hours. ...
  5. Make sure no cracks appear in the epoxy or the tank. ...
  6. Refill the tank with water.
Dec 9, 2020

Full Answer

Is there anyway to repair a cracked toilet tank?

To fix a cracked toilet tank, you have to clean the repair area thoroughly by draining the water, drying the tank, and sanding the affected area. Then, apply a waterproof epoxy or sealant, wait for it to cure, and finally refill the tank to see if the leak is fixed.

How can I repair a crack in my toilet tank?

That said, here are the materials you will be needing for fixing your toilet tank:

  • Waterproof Silicone Plumbing Epoxy
  • Caulking Gun
  • Putty Knife
  • Chamois Cloths, Towels, Sponges
  • Electric Hair Dryer

Can I repair/seal a crack in a toilet tank?

If you have a hairline crack in the tank or the bowl, experts say you may be able to stop the leak by sealing the crack with waterproof epoxy . Epoxy can also be effective for cracks at the base of the toilet, such as cracks or breakage around the bolts that secure the toilet to the floor.

How to fix a leaking toilet tank?

  • First, you have to close off the inflow of water to the tank by turning the valve at the main water tank pipe to avoid spilling water. ...
  • Now locate the fill valve at the left-hand side of the tank with a floating object. ...
  • Clench the bottom of the flush handle to avoid turning around. ...

More items...

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What can I use to fix a cracked toilet tank?

Fixing a Cracked Toilet TankTurn off the water. ... Dry the inside of the tank. ... Apply silicone plumbing epoxy to cracked area. ... Smooth the sealer out. ... Allow the silicone epoxy to dry. ... Refill the tank with water.

Can You Use Flex Seal in toilet tank?

Can I Use Flex Seal on a Toilet Tank? You can use Flex Seal brand products on a toilet tank just like any other epoxy. Make sure the surface is clean and dry, then spray with Flex Seal.

Can you repair a cracked porcelain toilet?

Hairline cracks often can be patched with a porcelain epoxy. Larger cracks or cracks that penetrate fully through a bowl usually cannot be repaired, requiring that the toilet be replaced.

Is it common for a toilet tank to crack?

Toilets are prone to cracking. If you just recently cracked your toilet there's no need to worry, this happens all of the time and there's affordable ways to have it fixed . Many people crack their toilet tank when trying to place the toilet tank cap/lid back onto the tank.

Can a broken toilet tank be repaired?

Any hairline cracks below the waterline will require a bit of patching with epoxy. Larger cracks below the water line means the toilet needs to be replaced entirely. While a patch can be done DIY, it is always best to consult with a professional plumber.

Can you use plumbers putty in toilet tank?

Historically, plumber's putty was used to seal a leaky toilet or toilet bowl to a finished floor. However, we do not recommend using plumber's putty for these types of applications, as this product can't support the weight of a toilet and is not waterproof.

How do you seal a cracked porcelain toilet?

A waterproof epoxy putty is the best repair material to fix a toilet bowl crack with. An epoxy starts off as two soft materials. When the two parts are mixed, a chemical reaction occurs and the putty cures to become a rock-hard substance.

How do you repair cracked porcelain?

If you want to fix chipped porcelain, you will need a gap-filling adhesive, a porcelain filler, or a touch-up glaze to replace lost material. Make sure your product is paintable if you plan on painting it. If you are joining broken pieces, opt for a strong liquid or gel adhesive that dries clear.

What is best glue for porcelain?

epoxyIf you have a project that requires gap bonding or filling, surface repairs or laminating, the best glue for porcelain or ceramic repairs will be an epoxy. An epoxy consists of two parts: resin and hardener. When mixed together, they produce a durable, high strength bond.

What causes hairline cracks in toilet tank?

What causes toilet tank cracks. The most common causes of hairline cracks are impact, age, and accidents. While tanks are generally sturdy, an impact with a heavy object or a person can cause a small hairline crack that expands over time.

Can you just buy a tank for a toilet?

Replacing a toilet tank is a task most homeowners can do without a call to the plumber. Because the tanks and bowls may be sold separately, you can often buy just the tank. However, it is important to match the toilet manufacturer and model to ensure proper installation and function of the toilet when you're done.

How do you seal a toilet tank?

3:126:57How To Fix a Leaking Toilet Tank - Remove Rusted Toilet BoltsYouTubeStart of suggested clipEnd of suggested clipSo the key you want to buy at the hardware store is a tank to bowl gasket kit and it's going to comeMoreSo the key you want to buy at the hardware store is a tank to bowl gasket kit and it's going to come with rubber washers that are going to seal the two bolts.

Can you fix porcelain toilets?

You can seal hairline cracks in a porcelain toilet with epoxy putty or some other kind of sealant.

How many years should a toilet last?

A good-quality toilet can last up to 50 years if taken care of properly, but realistically, a toilet will last around 10-15 years.

Can you replace just the tank of a toilet?

It depends on the kind of toilet. Some let you disconnect the tank from the bowl, and others do not. If you can disconnect the tank, then you can o...

How much should it cost to replace a toilet?

It depends on the severity of the damage, but it can cost anywhere between $50-$300 to fix a toilet.

Can Flex Seal fix a cracked toilet tank?

Yes, Flex Seal can be used to fix cracks around a toilet tank and bowl if they are just small hairline fractures. It will not be able to fix larger...

What do you do with old toilets?

You can throw it away in the dumpster, or you can donate it to a charity organization so they can restore and reuse it.

Why does my toilet tank crack?

Toilet cracks can be caused by many things, but most commonly are a result of: The most common reason a toilet tank cracks is due to wear and tear from ageing. A modern toilet can last up to 50 years if maintained properly, but it will stick chip and crack from age over time.

How to tell if a toilet has a crack?

The easiest way to identify whether your toilet has a crack in it is the presence of pools of water on the floor near the toilet. Below Water Level Cracks. If a crack is below the water level, it will be fairly noticeable as you should be able to see the leak.

Why is it hard to spot a crack in the toilet bowl?

Above Water Level Cracks. Above water level cracks can be hard to spot because they might not leak. If they are in a spot that is far enough away from water, you might be able to leave them alone for now, but keep an eye on them. Another symptom of a crack in the toilet bowl could be missing water from the tank or bowl.

Why are there cracks in my water tank?

Cracks that are below the water level in the tank will be very easy to spot because they will leak water onto the floors. These cracks are very serious and need to be taken care of immediately as they can leak dirty water on your floor. Above water level cracks in the bowl are more or less the same as in the tank.

How long does a toilet last?

A modern toilet can last up to 50 years if maintained properly, but it will stick chip and crack from age over time. Impacts with other hard objects like cabinets can also cause cracks in the toilet tank material.

How wide is a tank crack?

A good rule of thumb is that cracks wider than 1/16” probably cannot be fixed.

What to do if your water tank is leaking?

2. Next, flush the tank to remove any excess water and mop up any remaining water in the bowl and tank with some towels or sponges.

Why does my toilet tank crack?

A toilet tank may crack because of several reasons, including the ones discussed below. Botched-up DIY projects: It's not always a given that your little toilet or bathroom DIY project will go well. Sometimes even tightening a tank bolt or cleaning the tank might lead to a crack if done by accident or if done wrongly.

Why is there a crack in my toilet bowl?

While it's apparent that you have identified a crack in your toilet bowl (probably caused by hitting the bowl hard with a toilet flange plunger), there might be other cracks you haven't spotted yet. Other than an openly visible crack, a toilet leak or mysterious water loss in the tank indicates cracks.

How long does a toilet tank last?

Although manufacturers and plumbers agree that the average toilet lasts as many as 50 years, toilet bowls and tanks are prone to cracking, which may necessitate replacements. The good news is that you don’t have to do a replacement if you know how to fix a cracked toilet tank. Fixing a cracked toilet tank doesn't have to be hard or as risky as some ...

How to seal a water tank with epoxy?

5.1 Step 1: Locate all the Cracks. 5.2 Step 2: Turn Off the Water. 5.3 Step 3: Dry Both on the Inside and Outside of the Tank. 5.4 Step 4: Apply the Waterproof Epoxy to the Cracked Area. 5.5 Step 5: Smooth Out the Seal er.

Can you repair a hairline in a toilet tank?

You don’t even have to be a plumber to do a simple toilet tank repair. Nor do you need to call in a plumber.

Can you drop the lid of a toilet when replacing it?

Other times, you might drop the toilet tank lid when replacing it, causing the tank to break. Old age: Despite the 50-year durability guarantee on most toilets, age usually weakens them and may lead to a cracked toilet bowl or tank if you disturb the toilet excessively.

Can you use super glue on a toilet tank?

In such cases, you can use adhesive tape or super glue after draining all the water and drying the interior and exterior toilet surfaces. However, these solutions only last a short while since water weakens the bond between the glue or tape and the tank surface.

Why does my water tank leak?

Then again, it depends on how badly it was cracked. A minor crack may not lead to your tank leaking but a major one (like the one caused by a heavy object falling on the tank) might send your tank leaking. Cracks that are bad enough to cause water to leak should be fixed immediately.

How long does it take to turn off the water in a toilet?

There is water shut off valve that is usually located behind the toilet and turning that off doesn’t take five minutes. 2. Dry the inside of the tank. You will need to apply a sealer to your tank to fix the cracks and if the area is wet, the sealer won’t dry.

Why shut off water supply to toilet?

Shutting off the water supply is a wise decision because the last thing you want is for water to be spraying everywhere and making a mess of things. A cracked tank will leak water and this will spread to the floor.

Do you need to seal a tank?

You will need to apply a sealer to your tank to fix the cracks and if the area is wet, the sealer won’t dry. This is why you should really take all the time to make sure the tank is really dry before you start working on it.

Do toilet tanks stay strong forever?

Toilet tanks are built with durability and quality in mind but that doesn’t mean it will stay strong forever. Time will eventually prevail and we just need to take action to make sure the problem doesn’t escalate. gif (1×1) Post navigation. How To Fix a Slab Leak Garbage Disposal Leaking From Reset Button.

Is it bad to have a broken toilet replaced?

The last thing you want is to have your toilet replaced as the solution – that would be much more costly than remedying a broken tank. It even gets worse when you live with many people because one broken toilet can spell disaster for the entire household.

Can you dry a sanding tank?

Yes, the drying part may not be so fun but it’s a necessary step. You can use any kind of material that absorbs: chamois cloth, sponges or towels. To be more sure, wipe down the outside of the tank as well to avoid condensation.

Step 1 – Turning Off The Water

If the water is not leaking (which is rare) you don’t need to follow this step, although anytime you’re working on your toilet it’s wise to just turn off the water. The moment the toilet cracks turn off the water immediately.

Step 2 – Dry Out the Tank

It’s tempting to be lazy here and not dry out the tank. Always and always, always dry out the tank. It’s not the funnest part of the job, but what part is fun? Get towels, or anything that can pull out the water. Squirt guns can pull out the water, do what you have to do. Just make sure that tank is completely dry and the water is shut off.

Step 3 – Find a Porcelain Sealer or Use Epoxy

Epoxy sealer can be found at Home Depot for just a few bucks. Any porcelain sealer can also work. Be sure to check with plumbing experts to see if the specific branded sealer is good choice.

Step 4 – Apply the Sealer

Depending on the porcelain sealer you will most likely need a caulking gun. Fill the caulking gun with the sealer, and get started. Start an inch above the crack and slowly work your way down the crack and fill in the crack with the sealer.

Step 5 – Smooth Out the Sealer

For this you can take out a paper knife, or any tool that will help spread out the sealer over the crack. This will make the toilet look better, and will prevent other side cracks from starting. Remember – these toilet tanks are very fragile.

Summary

No toilet is perfect, cracks and hairline cracks happen all of the time. The toilet tank crack is not expensive, just slightly annoying. Good luck on getting it fixed.

How wide is a crack in a china toilet tank?

Usually a crack over 1/16 inch wide from the inside of a tank outward will mean it needs to be replaced.

How to repair a hairline crack in a tank?

Use the highest heat setting to dry the tank inside and out, focusing on the area nearest the hairline crack. Afterward, check that the crack has not yet extended from outside the tank to the inside. If there are no visible cracks on the inside of the tank, continue with the repair.

How to get rid of condensation in a water tank?

Use additional towels as well as sponges and a chamois cloth to absorb all the water in the tank, both on the tank floor and up the sides. Wipe down the outside of the tank as well, to remove any condensation.

Can you repair a toilet tank with hairline cracks?

However, sometimes the outer surface of a toilet tank will develop hairline cracks in the glazing, which can be repaired. You should make these repairs promptly before water begins to penetrate the glazing. Continue reading below Our Video of the Day.

How to Fix a Cracked Toilet Tank

Accidents can lead to cracked toilet tanks from time to time. When reattaching the lid, you dropped a heavy object on the tank. This problem can be corrected without the help of a professional by following these steps.

How to find cracks in toilet tank

Cracks may appear on the inside and outside of a toilet tank, as well as in the bottom of the tank. What needs to be done depends on the location of the crack. Read on to find out what to do.

Takeaway

The design of your toilet is probably not something you’ve paid much attention to, but when water starts leaking out, you should pay attention. A complete guide on how to fix a cracked toilet tank is the best way to deal with such a situation.

What to do if your toilet base is cracked?

If the base is cracked, simply follow the exact same steps as listed above for fixing the tank and bowl. However, if the toilet base is leaking a lot of water out onto the floor, you will need to replace it.

How to dry out a toilet tank?

First thing’s first, turn the water off so that no more water can go into the tank. If need be, flush the toilet to drain the water out of the tank. You can also use towels, cups, or anything else at your disposal to dry out the tank .

How big is a crack in a toilet?

What is important to remember here is that if the crack in your toilet is larger than 1/16 of an inch, it may be best to just replace the damaged part instead of attempting to repair it. Anyway, let’s jump into the repair process.

What to use to fix cracks in a wall?

Use plumber’s putty, a silicone sealant, or a waterproof porcelain epoxy to fix the crack. If need be, you may need to apply the material from both sides.

Why is it so hard to fix a bowl?

That said, the hardest part to fix is the bowl, mainly because it always has water flowing through it, and sealant or putty will only last so long. Also, keep in mind that when cracks are under the waterline, they automatically become much harder to repair than cracks or splits that are above the waterline.

Do toilet sealants last long?

Moreover, even the best of sealants and repair agents will only last so long. Although you can make a repair, it might not last long, and you may end up needing a new toilet bowl anyway. Either way, the steps for fixing the bowl are virtually the same as for the tank.

Can a toilet break?

Yes, toilets, although they are generally built tough, they can break. If you aren’t ready to throw in the towel and just buy a new toilet, you may be able to fix it. Let’s talk about how to do that.

What happens if you crack a toilet tank?

A hairline crack below the tank’s water level can widen due to water pressure and result in a leak, leading to severe damage to the house and property. Even a small, innocuous crack can pose a risk over time if not repaired.

Why does my toilet tank crack?

What causes toilet tank cracks. The most common causes of hairline cracks are impact, age, and accidents. While tanks are generally sturdy, an impact with a heavy object or a person can cause a small hairline crack that expands over time. Additionally, as the toilet tank ages, cracks can appear by themselves, usually due to slight imperfections in ...

How to keep toilet sealant from drying out?

Water prevents the sealant from drying out. Dry out the tank with a cloth or a towel. We recommend wiping down the outside of the tank to prevent condensation. Fill the crack with the putty or epoxy. Use the putty knife to smoothen the surface of the toilet tank. Leave the epoxy to dry out for at least 24 hours.

Can a crack above the waterline be repaired?

Even a small, innocuous crack can pose a risk over time if not repaired. For cracks above the waterline, it’s best to measure them regularly. Consider drawing a line on the crack to mark its progress.

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