What Can You Do When Nothing to Screw Toilet Flange to Concrete Floor?

Nothing to screw toilet flange to concrete floor

If you find nothing to screw toilet flange to concrete floor, you will have to drill perfect size holes using a drill machine or a hammer. The hole size should come with ¼-inches. Make sure that you drill minimum 4 holes with equal distances. Moreover, each of the holes should be cleaned on the concrete floor.

Now, you can screw the toilet flange concrete on the floor. But how can you install a new toilet flange and remove the old one on a concrete slab? It is a simple task when you have an effective and easy method.

Nothing to Screw Toilet Flange to Concrete Floor

When I have nothing to screw on my toilet flange on the concrete floor, I make 4-holes and then screw them new. The whole process is automatically cleaned in your mind to install your new toilet flange. However, let’s install the new toilet flange on the concrete floor to clear the matter.

How to Install a New Toilet Flange to Concrete Floor?

What will you need to complete the process? Here is a simple list for you. Before starting from scratch, you can collect the following tools and elements.

  • Hammer drill ¼-inches size
  • Angle grinder
  • Putty knife
  • Tape measurement
  • Screwdriver

Step 1: Remove Old Flange

After removing the toilet, the old flange comes out on the floor. You have to remove this old flange from the floor. According to my experience, the flange comes with nuts and bolts. So, remove nuts and bolts first. You will use a screwdriver or wrench to remove them. If these things are hard to remove, drop some lubricant to remove old flange nuts and bolts.

Step 2: Scrape Off Old Wax Ring

After removing the old flange, you will face the wax ring. The wax ring looks thick, sticky, and possibly looks stain color. Using a putty knife, you will easily remove the wax ring. After removing the wax ring, you must clean the area gently to assemble a new wax ring.

Step 3: Collect New Toilet Flange

To collect a perfect size toilet flange, make sure that you measure the exposed drain pipe. Your new toilet flange should match this pipe. Tape measurement truly works here to provide you with the perfect size toilet flange.

Step 4: Place T-Bolts in Your New Toilet Flange

Now, place T-bolts in your new toilet flange. Make sure that T-bolts come in the right position and it doesn’t move here and there.

Step 5: Position Toilet Flange

First of all, you need to press the toilet flange down the direction of the drain opening. Make sure that the bolts are at an equal distance from the wall. You will rotate the flange until it comes to the right position. Make sure that the flange comes with a straight position and secure it from moving.

Step 6: Drill for holes on the Concrete Floor

Now, it is time to drill the hole to assemble the flange on the concrete floor. With your hammer drill and ¼-inch concrete bit, make the holes properly. Try to make the holes the proper size so that the screws are easily put on the hole and make the flange secure.

Step 7: Screw the Flange

Use a Tapcon anchor or screwdriver to screw on the holes. If you have a plastic flange, you have to screw the flange so that it doesn’t crank carefully. After installing the flange, you will be able to apply a new wax ring. So, try to choose a new wax ring with a proper size for installing a wax ring.

What Size Screws for Toilet Flange in Concrete?

You can apply plenty of sizes of screws for toilet flange in concrete. But it would be better for you to measure the screw size first and then collect them. You can find out the right size screws from the pipe size. The pipe should be a drain pipe.

On the other hand, you will discover some standard toilet flange screw sizes for your concrete floor. For example, ¼-inches and ½-inches are most popular for toilet flanges in concrete. You can consider these two-size screws and apply them to your toilet flange without getting any problems.

FAQs (Frequently Ask Questions)

Q: Do you need to screw toilet flange to concrete?

Answer: Yes, you need to screw the toilet flange to the concrete. Because screwing on the concrete securely holds the toilet flange and makes the toilet secure. The flange is an essential element for the toilet; you need to screw and install the flange on the concrete securely.

Q: Do you screw toilet flange to floor?

Answer: I screwed the toilet flange to the floor to secure the flange on the floor. The toilet doesn’t drain water properly when you don’t secure the flange to the floor. On the other hand, the water also leaked and came out on the floor.

Q: How is toilet flange attached to floor?

Answer: If you want to attach the toilet flange to the floor, you have to install the flange properly. However, make 4 holes with ¼-inches size. After that, you need to put T-bolt on the flange. Use a screwdriver to tighten the flange, and finally, you can apply a wax ring to get better performance.

Q: Can you glue a toilet flange to the floor?

Answer: Though you can apply a toilet flange to the floor, I would love to advise you to avoid using glue on the toilet flange. But, if you don’t have any other options to use glue, you can use it and make sure that the glue comes with a waterproof solution.


When you have nothing to screw the toilet flange to the concrete floor, you can remove the old flange and install a new one. To assemble a new toilet flange, you have to make a minimum of 4-holes. Each of the holes should come with a ¼-inches size. On the other hand, measure the flange distance from the wall. To get a detailed answer and installation process, I would love to suggest you check out the above section.

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