How To Remove Cast Iron Toilet Flange: 6 Easy Steps

Are you facing a lot of water pooling from your toilet? Probably, you tried to identify the water pooling issue in your toilet but failed. If your toilet has been flushing or leaking, you may have a problem with the flange. The toilet flanges are of different types like PVC toilet flange, stainless steel toilet flange, iron cast toilet flange, and Brass The cast iron toilet flange is durable, but it may waste and create problems after using it for a long time.

The cast iron toilet flange is a plumbing fixture that is used to fasten the toilet bowl to the main drain pipe. This prevents the wastage of water and stops the leaking around your toilet bowl. Although they are durable, some models require regular replacement which causes wastage of money as well as larger consumption of water. The ineffectiveness of cast iron flange can also be caused due to over-usage or wrong installation. When you face such problems, how to remove cast iron toilet flange? Don’t worry! You will find complete information about this below.

What Are the Signs of Replacing Toilet Flange?

The toilet flange is hidden behind the toilet, and out of sight, it might be difficult to tell if it is broken. But, there are some signs and warning indicators that help you find out if there is a flange problem. 

  • If the toilet starts leaking broad base, it could have a crack in the flange, or your previous one may contain the wrong size for the toilet.
  • You may have a bad odor from your toilet if you have an issue with the old flange.
  • If the toilet seems loose or moves back and forth, definitely there’s a problem with the flange. 

If you face such issues, you may need to replace your old style cast iron toilet flange.

Some Common Issues With the Toilet Flange

How To Remove Cast Iron Toilet Flange

Here are some of the common problems in front of you.

  • Broken Flange: You may have a broken or cracked flange. Because of breaking, you may face water pooling all the time. After inspecting, if you find a broken flange, you must replace it.
  • Clogged Flange: Clogged or blocked flange may create unpleasant odors in your toilet. If you identify the clogged flange, you will replace a new one.
  • Too High Flooring: If the flange on the drainage pipe is too high to connect correctly to the new floor, it may need to be changed or replaced.
  • Wastage Wax Ring: Your toilet always needs fast and secure finishing. If your toilet is getting old, the wax ring may be broken or loose. That’s why you may have to pool more water. You can use a waterproof wax ring or replace the wax ring to seal it properly.

Easy Steps How To Remove A Toilet Flange

How To Remove Cast Iron Toilet Flange Step by Step

Before starting, take your safety gloves and goggles or mask to make you safe, as it is about in your toilet. To remove the cast iron toilet flange, you can follow these easy steps:

Step:1. Remove The Toilet 

Disconnect the toilet from the building’s water supply. Then flush the toilet tank many times to empty it. Then Remove the water supplying sock to your toilet before starting the replacement process. After that, if you find any leaks, have a towel or any large container ready to catch them. 

Cover the floor of your bathroom with a newspaper or a sheet. Use the wrench to unscrew the nuts that connect the tank to the bowl. Carry the toilet with towels and place it in newspapers. Because toilets are heavier than most fittings, you’ll need additional hands to lift them. 

Step: 2. Restrict The Waste Pipe

Once you remove your toilet, you must block the cast iron toilet drain pipe. It will keep sewer gasses from producing an awful smell. It will also keep the screws safe from falling into the mainline. You can use an old towel or t-shirt to block the pipe. Make sure it’s not too tight or too far down. As a result, you’ll be able to easily remove it later.

Step: 3. Clean The Flange 

To determine the best way to remove the flange, clean and check it. On top of the flange, you’ll see a wax ring. The toilet base and flange connection are both sealed. As a result, it must look discolored. Scrape it off with a putty knife. An old towel or newspaper will come in handy to wipe it down because wax sticks to the putty knife.

Step: 4. Check The Flange

The next step is to check the flange. You’ll have to check it yourself if the flange doesn’t break. And the flange size is correct or not. After checking if it is okay, you go for the final step.

Step: 5. Remove The screws 

You have to remove screws before removing the toilet flange. Using a socket wrench can help you here. Make sure to remove it easily. It will prevent breaking the flange at the pipe connection. If the cast iron toilet flange bolts are not removed, you need to cut the old flange part.

Step: 6. Remove The Flange: 

After that, you must remove the flange. You need to press the edge up with a chisel tool put under it to do it. If it does come up a little, use a piece of wood as a shim to hold it up. Then you need to push up another section of the flange with the pipe wrench. Continue on like this until it is no longer free. Then take it out.

After you set the new flange, make sure the wax ring should be sealed properly or have waterproof features. Then repeat these steps in reverse order when you’re ready to install a new toilet flange.

How To Replace A Cast Iron Toilet Flange In Concrete

How To Replace A Cast Iron Toilet Flange In Concrete

Replacing the flange in concrete is a difficult task. But you can simply replace the flange with power tools. Fortunately, there are a few steps that can assist you with the procedure.

  • Remove the toilet and cut out old flanges and barriers. 
  • Then you must remove any obstructions before installing the new flange.
  • Cut bolts and other stretch barriers with a multi-tool equipped with an angle grinder or metal-cutting blade.
  • Remove all remains of the wax ring and place the pieces in a plastic bag to be disposed of.
  • Make sure your new flange is appropriate for this pipe. To help you choose a replacement flange, measure the diameter.
  • Place the T-bolts on the new toilet flange upside down so that the threaded shafts are at the top.
  • Using the T-bolt as a reference point for placement, press the toilet flange into the drain opening.
  • Ensure both bolts are at the same distance from the rear wall, so the toilet tank is parallel to the wall.
  • Check to see if the flange fits nicely without any gaps.
  • Make four holes at equal distances around the ring on the concrete with a hammer drill in a 1/4-inch concrete. To go to the appropriate depth, use the hammer drill depth gauge.
  • To secure the toilet flange to the concrete slab, use a tapcon anchor or a similar masonry / concrete screw.
  • You can now install the toilet with a new wax ring in replacing the toilet flange.

Note:  Replacing a toilet flange in concrete is a difficult task. That is not advised for the common DIYer. It should be attempted by people with a strong understanding of plumbing.

FAQs: How To Remove Cast Iron Toilet Flange

Can I Replace A Toilet Flange On My Own?

Yes, you can do it yourself with a cast iron toilet flange repair kit and replace a toilet flange. Flange replacement is normally a simple DIY project. However, in some cases, like cast iron toilet flange repair, you may decide it’s best to call a plumber.

How Much Does It Cost To Replace A Cast Iron Toilet Flange?

The cost may vary depending on the contractor you hire and the location of the replacement. The price ranges from $170 to $300 if you hire someone. If you do it by yourself, the total installation cost to replace the cast iron flange will be closer to $75 

Where Can You Buy Toilet Flanges?

A home hardware store or Amazon are the best places to look for a wide range of toilet flanges. Department stores are selling toilet flanges, but they miss other online shops’ variety.  

How Do You Remove A Rusted Toilet Flange?

Removing a rusted toilet flange can be a difficult task. The first step is to break the seal between the flange and the toilet by using a chisel and hammer. Once the seal is broken, use a screwdriver to pry the flange off of the toilet. If the flange is still attached to the pipe, use a hacksaw to cut it off. Finally, use a wire brush to clean off any remaining rust.

Do I Need To Replace The Toilet Flange?

When you get an excessive amount of water pooling from the base of your toilet, and If the flange is damaged or broken, you will need to replace it. If it is still in good condition, you can clean it and re-seal it.

How To Replace Pvc Toilet Flange?

First, shut off the water supply. Remove the bolts and lift off the toilet. Now clean the surface. Then take out the old flange. You can now install the new PVC toilet flange. After that, you should do the reverse order to set the toilet.

Can I Replace Cast Iron Toilet Flange With PVC?

Yes, PVC flanges can replace cast-iron flanges. It uses 3-inch stainless steel bolts to fit into 4-inch pipes.

Final word

How to remove cast iron toilet flange may look pretty easy if you look at our 6 easiest ways. It is pretty simple to remove. But before removing the toilet flange, make sure it is the only enemy. Then you can easily remove the toilet flange. 

You must take safety and do it with care; otherwise, you will hurt yourself, or you may get dirty. If you still fail to remove it, please contact an expert to perform it for you.

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