How to Replace a Toilet Flange on Concrete: A Step-by-Step Guide

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How to Replace a Toilet Flange on Concrete

A toilet flange is a critical part of your toilet. It’s the metal ring that connects the toilet to the drainpipe, and it helps to create a seal that prevents leaks. Over time, the toilet flange can become damaged or worn out, and it will need to be replaced. Replacing a toilet flange on concrete is a relatively simple DIY project, but it’s important to follow the steps carefully to ensure that the job is done correctly.

In this article, we’ll walk you through the process of replacing a toilet flange on concrete. We’ll provide step-by-step instructions, as well as tips and advice to help you get the job done quickly and easily.

So if you’re ready to learn how to replace a toilet flange on concrete, read on!

Step Instructions Image
1 Turn off the water supply to the toilet.
2 Remove the toilet tank.
3 Remove the old flange.
4 Apply a bead of plumber’s putty around the new flange.
5 Install the new flange.
6 Reattach the toilet tank.
7 Turn on the water supply to the toilet.

A toilet flange is a metal or plastic ring that connects the toilet to the drainpipe. It is an important part of the toilet, as it helps to create a seal between the toilet and the drainpipe, preventing leaks. Over time, the toilet flange can become damaged or worn out, and will need to be replaced. Replacing a toilet flange is a relatively simple task, but it is important to do it correctly to avoid leaks.

In this guide, we will walk you through the steps of how to replace a toilet flange on concrete. We will provide detailed instructions and photos, so you can be confident that you are doing the job correctly.

Tools and Materials Needed

The following tools and materials are needed to replace a toilet flange on concrete:

  • Toilet flange
  • Wax ring
  • Penetrating oil
  • Pliers
  • Hacksaw
  • Hammer
  • Chisel
  • Tape measure
  • Level
  • Bucket
  • Shop vac

Steps to Remove the Old Flange

1. Turn off the water supply to the toilet. This can be done by turning the shut-off valve located under the sink or behind the toilet.
2. Flush the toilet to drain all of the water from the bowl.
3. Remove the toilet seat. There are usually two screws located on the underside of the toilet seat. Remove these screws with a screwdriver.
4. Locate the toilet flange. The toilet flange is a metal or plastic ring that is located in the floor directly below the toilet. It is usually made of brass or plastic.
5. Apply penetrating oil to the bolts that hold the toilet flange in place. This will help to loosen the bolts and make them easier to remove.
6. Use a hacksaw to cut the bolts that hold the toilet flange in place. Be careful not to cut the water supply line or the drainpipe.
7. Use a hammer and chisel to break the toilet flange loose from the floor. Be careful not to damage the floor.
8. Use a shop vac to clean up any debris.

Steps to Install the New Flange

1. Apply a thin layer of plumber’s putty to the bottom of the new toilet flange. This will help to create a seal between the flange and the floor.
2. Center the new toilet flange over the drainpipe. Make sure that the flange is level.
3. Secure the toilet flange to the floor with bolts. Use the same bolts that you removed from the old flange.
4. Apply a new wax ring to the bottom of the toilet. This will help to create a seal between the toilet and the flange.
5. Place the toilet on top of the flange. Make sure that the toilet is level.
6. Secure the toilet to the floor with bolts. Use the same bolts that you removed from the old flange.
7. Turn on the water supply to the toilet.
8. Flush the toilet to test the seal.

Replacing a toilet flange on concrete is a relatively simple task, but it is important to do it correctly to avoid leaks. By following these steps, you can be confident that you are doing the job correctly.

Here are some additional tips for replacing a toilet flange on concrete:

  • Make sure that the new toilet flange is the same size as the old one.
  • Use a level to make sure that the new flange is level.
  • Apply a generous amount of plumber’s putty to the bottom of the new flange.
  • Tighten the bolts that hold the flange to the floor securely.
  • Flush the toilet to test the seal.

If you have any questions about replacing a toilet flange on concrete, please contact a qualified plumber.

How to Replace a Toilet Flange on Concrete

Replacing a toilet flange is a relatively simple task that can be completed in about an hour. However, it is important to follow the steps carefully to ensure that the new flange is installed correctly.

Tools and Materials

To replace a toilet flange, you will need the following tools and materials:

  • A new toilet flange
  • A hacksaw
  • A screwdriver
  • A putty knife
  • A bucket
  • A shop vac
  • Plumbing putty
  • Silicone sealant
  • A new wax ring

Step 1: Turn off the water supply to the toilet

The first step is to turn off the water supply to the toilet. This can be done by turning the shutoff valve located under the sink or behind the toilet. Once the water supply is turned off, flush the toilet to drain the water from the tank and bowl.

Step 2: Remove the old toilet flange

The next step is to remove the old toilet flange. To do this, you will need to use a hacksaw to cut through the bolts that hold the flange in place. Once the bolts are cut, you can use a screwdriver to pry the flange off of the toilet.

Step 3: Clean the toilet bowl

Once the old flange is removed, you will need to clean the toilet bowl. This can be done by using a bucket of water and a shop vac to remove any debris.

Step 4: Apply plumber’s putty to the new flange

The next step is to apply plumber’s putty to the new flange. This will help to create a seal between the flange and the toilet.

Step 5: Install the new flange

The next step is to install the new flange. To do this, you will need to line up the flange with the bolts in the toilet bowl. Once the flange is lined up, you can use a screwdriver to tighten the bolts.

Step 6: Apply silicone sealant around the flange

The final step is to apply silicone sealant around the flange. This will help to prevent leaks.

Replacing a toilet flange is a relatively simple task that can be completed in about an hour. However, it is important to follow the steps carefully to ensure that the new flange is installed correctly. By following these steps, you can easily replace a toilet flange on concrete.

How do I remove a toilet flange from concrete?

1. Turn off the water supply to the toilet. Locate the water supply valve under the sink or toilet and turn it clockwise until it is completely closed.
2. Flush the toilet to drain the water from the tank and bowl.
3. Place a bucket under the toilet to catch any residual water.
4. Use a putty knife or utility knife to loosen the wax ring around the base of the toilet.
5. Insert a pry bar or large screwdriver under the flange and pry it up.
6. Work your way around the flange, prying it up until it is free.
7. Remove the toilet flange from the concrete.

How do I install a new toilet flange on concrete?

1. Locate the center of the drain opening in the concrete.
2. Mark the center of the drain opening with a pencil.
3. Drill a 1-inch hole in the concrete at the marked location.
4. Insert a 1-inch PVC pipe adapter into the hole in the concrete.
5. Apply a bead of silicone sealant around the outside of the PVC pipe adapter.
6. Press the toilet flange onto the PVC pipe adapter.
7. Secure the toilet flange to the concrete with 4-inch screws.
8. Turn on the water supply to the toilet.
9. Flush the toilet to test the new toilet flange.

What is the best type of toilet flange for concrete?

The best type of toilet flange for concrete is a PVC pipe adapter flange. This type of flange is made of durable PVC material and is designed to be installed directly into a concrete floor. PVC pipe adapter flanges are available at most home improvement stores.

How much does it cost to replace a toilet flange?

The cost of replacing a toilet flange varies depending on the type of flange and the cost of labor. A PVC pipe adapter flange typically costs between $10 and $20. The cost of labor for replacing a toilet flange ranges from $50 to $100.

How long does it take to replace a toilet flange?

Replacing a toilet flange typically takes between 30 minutes and 1 hour. The exact time it takes to replace a toilet flange will vary depending on the type of flange and the experience of the person doing the work.

What are the risks of not replacing a toilet flange?

If a toilet flange is not properly installed or is damaged, it can leak water. This can lead to water damage to the floor, subfloor, and foundation. A leaking toilet flange can also create a health hazard by providing a breeding ground for mold and bacteria.

Replacing a toilet flange on concrete is a relatively straightforward process, but it is important to follow the steps carefully to ensure that the new flange is installed correctly. By following the steps outlined in this guide, you can replace your toilet flange on concrete with ease.

Here are the key takeaways from this guide:

  • The first step is to remove the old flange. To do this, you will need to disconnect the toilet from the water supply and drain lines.
  • Once the old flange is removed, you will need to clean the area around the toilet drain. This will help to ensure that the new flange is installed properly.
  • The next step is to install the new flange. To do this, you will need to apply a sealant around the flange and then place it in the toilet drain.
  • Finally, you will need to reconnect the toilet to the water supply and drain lines.

By following these steps, you can replace your toilet flange on concrete with ease. This will help to ensure that your toilet is properly installed and that it functions properly.

Author Profile

Liana Farrell
Liana Farrell
Liana Farrell is the owner of toiletty.com. She is a mom of two and is very passionate about home improvement.

Liana has ten years of home improvement experience, and in her own words, she said: “I love improving the home, and I’m very passionate about keeping the home in the best possible condition. I love it!”

Liana Farrell balances beauty and functionality when she goes about her home improvement jobs.