What Kind of Screws to Secure the Toilet Flange?

What Kind of Screws to Secure the Toilet Flange?

Note: As an amazon associate I may earn a small commission from qualifying purchases if you click to amazon from my site and choose to make a purchase.You can read my complete affiliate disclosure for more details

What Kind of Screws to Secure the Toilet Flange?

A toilet flange is a rim that surrounds the outer surface of a toilet tank. The flange helps to distribute water evenly and to prevent rust from forming. It boasts a hinge attached to the top of the tank, so you can raise or lower it as needed. 

Masonry screws-Corrosion resistant.
– Easy to install.
– Convenient for attaching to concrete.
– Available in both coarse and fine thread.
Stainless steel screws-Boasts stainless steel for excellent corrosion resistance.
-Provides long-lasting durability.
-Suitable for moist environments like bathrooms.
Self-Tapping Screws  -Sharp, self-drilling point for easy installation.
-Threads designed to grip the flange and sub-floor securely.
-Corrosion-resistant coatings for durability.
Galvanized Screws     -Coated with galvanized zinc for corrosion resistance.
-Suitable for outdoor or wet environments.
-Provides good strength and durability.
Zinc-Plated Screws-Coated with zinc for increased corrosion resistance.
-Offers good strength and durability.

-Suitable for indoor applications.
-Available in various lengths and diameters.
Coated Deck Screws  -Designed for use with wood sub-floors.
-Coated for corrosion resistance and durability.

-Strong and reliable fastening.
-Suitable for securing toilet flanges to wooden floors.
-Available in different sizes and thread types.
Brass screws-Corrosion resistant.
-Easy to install.

-Suitable for indoor applications.
-Available in various lengths and diameters.

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

If you don’t have anything to screw your toilet flange to your concrete floor, you can consider using:

1. Concrete Anchors

This can help you to secure the flange to the floor. Drill holes into the concrete floor where the screw holes of the flange boast location. Insert concrete anchors into the holes and then attach the flange using screws that fit the anchors.

2. Self-Drilling Screws and Anchors

This is the simplest method of screwing the toilet flange into your bathroom floor. Just insert one or two screws and attach them with a single anchor directly below them.

3. Pressure-Treated Lumber

You can use pressure-treated lumber as a substitute for concrete anchors if you like to place your toilet on top of the floor rather than the usual ground or concrete floor.

What Kind of Screws to Secure the Toilet Flange?

4. Expansion Bolts and Anchors

This is a suitable method of attaching the flange to the floor. It is strong and does not compromise your bathroom’s aesthetic value.

Drill holes into the concrete floor where the screw holes boast location, insert expansion bolts, and then use an anchor to secure them.

5. The Use of Screws and Nail

If you don’t have a secure option, your flange must use nails and screws to attach it. That is what most plumbers do.

On the negative side, you have to worry about the flange coming off if you do not use nails and screws that have enough strength to hold it in place.

Why Is My Toilet Not Secured to The Floor?

Loose Bolts-Poor installation.
-Over usage.

– Bad materials.
– Construction errors.
Worn Gasket-Time spent in the water.
– Seaweed or salt build-up.
– Heavy usage.
Faulty Installation-Improper installation.
– Plumber error.
Shifting Subfloor-Shifting subfloor while in the water.
– Shifting subfloor during installation.

– Holes drilled through the floor.
– Heavy usage.
Aging Components-Drain Plug.
– Overloading of a toilet.
– Plastic components over time.
Replacement components-Replacement parts made by machine, not made by hand.
– Shrinking parts over time.

What Can I Use to Secure My Toilet Flange To The Floor?

Wax RingA wax ring is a common and reliable method. It creates a watertight seal between the toilet flange and the toilet.Easy to install and Provides a good seal.
Toilet Flange BoltsFlange bolts and nuts secure the toilet flange to the floor by attaching it to the toilet base.Durable and sturdy.
Closet Flange SpacerA spacer or extender is used when the existing flange is not at the correct height.Allows adjustment for height discrepancies.
Flange Repair KitA repair kit is useful if the existing toilet flange is damaged or broken.Provides a solution for damaged flanges.
Epoxy ResinEpoxy resin can permanently secure the toilet flange to the floor.Provides a strong bond.
Expansion AnchorsExpansion anchors or concrete screws can secure the flange to concrete or another solid flooring.Suitable for concrete floors or other hard surfaces.

Does The Toilet Flange Bolt To The Floor?

The toilet flange is typically bolted to the floor to secure it. It is a mounting point for the toilet, and you must attach it firmly to the floor to provide stability and prevent leaks.

Before bolting the flange to the floor, you need to anchor it. The flange is typically attached to a concrete floor, but you can also use other flooring types.

Most flanges have predrilled holes; you should align them with the floor. Place a thin strip of wood between the flange and the floor as a spacer. This will ensure that you position the bolts at right angles.

Once you outline the flange using a pencil, use an electric drill and make holes in the floor. After drilling holes, use concrete anchors and screws to attach them to the floor.

If the bolts are long enough, you can use a hammer to fasten the flange to the floor.

If it’s leak and want to replace a broken flange, use a screwdriver or wrench to unscrew it from the floor. If your toilet has an extra hole without a flange attached, you need to get a new one that conforms to your toilet specifications. 

What Are the Three Most Common Flange Types?

Welding Neck flange-The long-tapered hub with a smooth transition to the pipe.
-Provides excellent strength and stress distribution.

-Suitable for high-pressure and high-temperature systems.
-Requires welding for installation.
Socket Weld flange-Two pieces that interlock with a taper fit.
-Provides a fast, easy, and economical means of installation.

-Suitable for lower pressure and temperature applications.
-Requires machining for welding the socket to the pipe.
Slip-on flange with integral gasket-Provides excellent strength and performance.
-Can be removed and reinstalled with minimal effort.

-No machining required for installation.
-Specially built to function with an integrated Gasket seal.

Whatever flange type best suits you depends on your design requirements, cost, piping material, and other factors.

The most important consideration is choosing a flange that satisfies the flow requirements of your system. Choosing the wrong flange can lead to system failures, which can be time-consuming and costly.

Can I Install A Toilet Without A Flange?

No, The flange is a crucial component of a toilet installation that serves several essential functions.

It is a circular piece, usually made of PVC or cast iron, which is attached to the waste pipe on the floor and connects the toilet to the plumbing system.

Here’s why the flange is essential:

1. It prevents sewer gases from getting into the building’s sewer.

2. It acts as a seal to prevent sewer gases from entering the building and back into the sewage system.

3. It contains plumbing fixtures such as overflow tubes, sink traps, and wall-hung toilets.

4. The flange keeps pipes on the floor from leaking if a high-water pressure event hits your home or if your house boasts poor construction.

For example, the flange (or floor flange) is a supporting point for the soil stack that transports waste from the toilet to the building sewer.

5. It forms a barrier for protecting the toilet from outside forces. For example, scrapes, beats, and bumps caused by children or pets can damage the toilet and cause it to leak (or worse).

6. Plumbers use it during installation to provide mounting points for fixtures such as the sink trap and overflow tube on floor-mounted toilets.

What Kind of Screws to Secure the Toilet Flange?

A tapering flange is provided so these fixtures can be adjusted vertically from the floor surface to where they connect with the waste pipe on the building sewer.

Do Toilet Flanges Leak?

Toilet flanges can develop leaks in the following circumstances:

1. Loose or damaged flange: If it becomes loose or damaged, it may cause water to seep out around the toilet’s base. This occurs due to wear and tear or if you did not install the flange initially.

Toilet flanges are bolted or snapped into place onto the toilet with a gasket and bolts. The bolts can become loose over time due to wear and tear.

2. Loose flange mounting bolts: Loose bolts in the flange can cause water to leak around the toilet base.

3. Damaged flange base: Sometimes, the porcelain surface on which you mount the flange becomes damaged. This can happen if you drop a toilet during installation or if a leaky pipe or other reason badly hurts a toilet.

4. Burned-out wax ring: The wax ring seals the gap lying between the toilet and the floor, preventing water from leaking beneath the toilet.

If you install an old wax ring on a new toilet bowl, the wax ring will eventually break down from the stress of moving parts in the toilet.

If too much time passes before replacing a worn-out wax ring, the flange gasket may also burn out and leak.

5. Bent flange: The flange can become bent while pushing a toilet into a place that is too big for its space or under pressure from a cracked or damaged toilet base.

Does The Toilet Flange Go on Top Of The Tile?

You can typically install the toilet flange on the finished floor, not directly on top of the tile. When installing a toilet flange, place it on a solid and level surface. Here’s how:

1. Ensure that the area where you install the toilet is clear of debris or old wax ring remnants.

2. Measure the distance from the finished floor to the top of the flange to ensure it will lie within the correct height for the toilet.

3. Cut and install the flange, following the manufacturer’s instructions.

4. Install the toilet into the tank and tighten up the nuts on the flange with a wrench to secure it to the tank.

5. Install a wax ring under the toilet, around the base of it, just like you would install around any other fixture.

6. Lay the toilet flush with the flange. 

7. Install a wax ring around the toilet, following steps 5 and 6. Always install a wax ring on all toilets for extra support on the floor below and to prevent leaks and drips from happening over time.

Ensure you always read installation instructions from a manufacturer or supplier, as there are differences depending on how you install it in your home or business.

If you need clarification on any installation part, hire a professional to help you.

Should The Toilet Flange Be Screwed?

Yes! Screwing your toilet flange boasts some pros, such as:

1. Noise Reduction: Loose toilet flanges can create annoying rattling or squeaking noises when you apply pressure to the toilet. The sounds can occur due to the movement of the flange against the floor.

By firmly securing the flange with screws, you minimize the possibility of these noises, contributing to a quieter bathroom experience.

2. Elimination of water leaks: Because loose flanges make noise, they may also leak water. If your flange is not secured against the flooring, it is more likely to wobble and cause holes or cracks, which let water seep beneath the toilet.

3. Better Appearance: Screwed flanges allow you to re-tile around them without removing them, as it is often necessary with a glued flange. The tiled shower/tub surrounds a screwed flange for easier installation.

4. ‘Do it yourself’ access: Loose flanges are sometimes difficult to access with the usual tools, such as a screwdriver or wrench. Using a drill, you can quickly bring the screws out without prying them out of the wood tub surround.

5. Reduced water damage: Glued flanges can come loose over time, allowing water to leak behind the flange. By screwing the flange, you are protecting the subfloor from future water damage.


The toilet flange is a vital component of your plumbing system that you must install and maintain well. Correct installation is the key to a long-lasting and leak-free toilet.

Contact a professional plumber or qualified plumbing technician if you need help installing a toilet flange.


Hi! I' am Tyron. I faced many questions from customers about different products, and there was hardly any help on the internet. After learning all the things about these products as a manager the hard way, I decided to start a blog and help other people.

Recent Posts