How to Install a Wax Ring on a Toilet

To install a toilet wax ring, remove the old seal, clean and inspect the toilet flange, press a new wax ring onto the toilet outlet, then lower, seat, bolt, reconnect, and test the toilet. The important part is getting the toilet stable and fully seated before tightening the bolts. A wax ring is a one-use seal, so use a fresh one whenever you lift a toilet off the flange.

What a Toilet Wax Ring Does

A wax ring seals the joint between the toilet’s outlet and the floor drain opening, called the toilet flange or closet flange. It keeps flushed water and sewer gas inside the drain system.

Replace the wax ring when you remove a toilet for new flooring, repair a loose toilet, or address water appearing around the base. A rocking toilet, sewer smell, or a leak after flushing can also point to a failed seal, but inspect the flange and toilet stability before assuming wax is the only problem.

Tools and Parts You Need

Gather everything before shutting off the water:

New toilet wax ring
New toilet mounting T-bolts, nuts, washers, and bolt caps
Bucket, towels, rags, and a sponge
Gloves
Putty knife or plastic scraper
Adjustable wrench
Hacksaw blade and file
Toilet shims, if needed
Caulk, if you are replacing a removed bead around the toilet base
A drain plug if the toilet will be off for an extended period

Do not plan to reuse the old wax ring.

How to Install a Wax Ring on a Toilet

Use this table to decide whether the flange needs attention before you install the new seal.

What You Find	What to Do
Flange is solid, level, and securely attached	Install the new wax ring and mounting bolts.
New thick flooring leaves the flange too low	Install a flange spacer before fitting the wax ring.
Flange is cracked, corroded, loose, or will not hold bolts	Install the needed flange repair part or call a plumber.
Toilet rocked enough that one side of the base lifted from the floor	Treat the flange as potentially damaged and inspect it before installing the new seal.
Toilet base is slightly uneven but flange is sound	Use toilet shims after the toilet is seated.

Step 1: Shut Off the Water and Remove the Toilet

Turn the shutoff valve behind or beside the toilet clockwise until the water stops.
Flush the toilet to empty the tank. Hold the flush lever down if needed, then sponge out remaining water from the tank and bowl.
Place towels and a bucket under the water supply connection. Disconnect the supply line from the bottom of the tank.
Remove the plastic bolt caps at the toilet base, then loosen the nuts on the mounting bolts. If a nut is badly rusted, cut it off carefully with a hacksaw blade.
Hold the toilet near the bowl, gently twist it to break the old wax seal, and lift it straight up. Toilets are heavy and porcelain can crack, so get help if you cannot lift it safely.
Set the toilet on cardboard, towels, or another padded surface with the outlet facing up.

Step 2: Remove the Old Wax and Plug the Drain

Put on gloves.
Scrape all old wax from the toilet outlet and the top of the floor flange with a putty knife. Remove loose debris, old caulk, and fragments of damaged hardware.
Immediately block the open drain to keep sewer gas out of the room and prevent objects from falling in. For a toilet that will stay removed for an extended time, use a 3-inch to 4-inch gripper plug; for an immediate reinstall, stuff a large ball of rags into the drain.
Keep the plug or rags visible so you remember to remove them before lowering the toilet.

Step 3: Inspect the Flange and Install New T-Bolts

Check the flange for cracks, decay, movement, or missing sections. It should be securely fastened and able to hold the toilet bolts in place.

Oatey recommends that the toilet flange sit on top of the finished floor. If you installed thicker flooring and the flange now sits too low, install a flange spacer before putting in the wax ring.

Replace the mounting T-bolts whenever you replace the wax seal. Slide the new bolts into the flange slots and secure them with the provided retainer washers. Position them so they are centered with the flange opening and parallel with the finished wall behind the toilet tank. This helps the toilet lower straight onto the seal.

Step 4: Press the Wax Ring Onto the Toilet Outlet

Remove the rags or drain plug only when you are ready to set the toilet.

Press the new wax ring firmly onto the toilet outlet on the underside of the bowl. If your ring has a molded plastic flange, position the plastic flange pointing away from the bowl, toward the floor drain.

Fluidmaster’s wax-gasket installation directions use this bowl-mounted position so the wax stays in place while you lower the toilet. Do not apply paste, putty, adhesive, or caulk underneath the wax ring.

Step 5: Lower and Seat the Toilet

Hold the toilet above the flange and line up the bolt holes in the base with the T-bolts.
Keep the tank parallel with the wall as you lower the toilet straight down.
Once the bowl reaches the floor, use your body weight to compress the wax ring.
Twist the bowl slightly side to side to spread the wax and finish seating the seal.

Do not rock the toilet back and forth to force it down. If the toilet will not sit on the finished floor, or the bolts do not line up, lift it back off and find the obstruction or flange problem. Use a new wax ring after lifting a toilet from a partially compressed seal.

Step 6: Secure the Toilet Without Cracking It

Place the hardware on each bolt in this order:

Bolt cover washer
Metal washer
Acorn nut

Tighten the nuts gradually, alternating from one side to the other so the bowl stays level. Stop when the toilet is snug and stable. Do not over-tighten the nuts: porcelain can crack under too much pressure.

If the bolts extend too far for the caps, use a hacksaw blade to cut each bolt ¼ inch above the acorn nut. File off sharp burrs, then snap the bolt caps into place.

Step 7: Reconnect, Refill, and Test the Toilet

Reconnect the water supply line to the bottom of the tank.
Turn the shutoff valve counterclockwise to restore water.
Let the tank fill, then flush the toilet.
Look closely around the toilet base, supply connection, and shutoff valve for drips.
Sit or press gently on each side of the bowl to confirm it does not shift or rock.

If you removed caulk from around the base, replace it after the toilet passes its leak and stability check.

Fix Common Flange and Floor Problems

A secure, level flange, stable toilet base, and centered T-bolts let a fresh wax ring seal properly.

A Flange Is Too Low After New Flooring

Thicker flooring can leave a gap between the toilet and the flange even when the toilet reaches the floor.

Install a flange spacer to bring the flange up before installing the ring. Then fit new T-bolts, press a fresh wax ring onto the bowl outlet, lower and secure the toilet, reconnect the water, and flush-test for leaks.

The Toilet Rocks After It Is Seated

If the flange is secure and the toilet is otherwise level, slide toilet shims under the unsupported edge of the base until the bowl is stable. Tighten the bolts only enough to hold the toilet in place, then trim or conceal the shims as appropriate.

If one side of the toilet base can lift off the floor, inspect the flange for damage before attempting to tighten anything further. A cracked flange, rotten subfloor, or loose drain connection needs repair before a new seal can work.

The Bolts Will Not Stay Upright

Loose, bent, corroded, or off-center bolts make it difficult to lower the toilet squarely onto the wax ring. Replace them with new T-bolts and retainer washers, and position them centered in the flange opening before setting the bowl.

Do not use the mounting nuts to pull a misaligned toilet down onto the flange. Lift the toilet, correct the bolt position, fit a fresh wax ring, then lower the bowl straight down.

Check the Installation and Prevent Future Leaks

After the first flush, confirm all of the following:

No water drips from the supply connection or shutoff valve.
The toilet does not rock, shift, or lift at any edge.
The toilet flushes normally without a sewer-gas smell.
The bolt caps fit securely over the hardware.

Check the area around the toilet base again over the next few days, especially after several normal flushes.

Caulk is a finishing bead, not a cure for toilet movement. If the toilet rocks, leaks, or sits unevenly, correct the flange, floor, or shims first.

When to Call a Plumber

A toilet reset is usually a manageable DIY repair when the toilet, flange, and floor are in good condition; the following problems call for a plumber. Call a plumber if you find any of these problems:

A cracked or severely corroded flange that cannot hold repair hardware
A soft, damaged, or rotten bathroom floor around the toilet
Sewage backing up through the open drain
A toilet that still leaks after being reset with a new wax ring
A shutoff valve that will not close or begins leaking when operated
A drainpipe or flange that moves when the toilet is removed

These problems can involve drain piping, structural floor damage, or a major leak rather than a simple seal replacement.

Frequently Asked Questions

Do I Put the Wax Ring on the Toilet or the Flange?

Put the wax ring on the toilet outlet, on the underside of the bowl. If it has a plastic flange, the plastic flange points away from the bowl and toward the floor drain. This keeps the ring attached while you line up the toilet with the bolts.

Can I Replace a Toilet Wax Ring Myself?

Yes, if the flange is solid, the floor is sound, and you can safely lift the toilet or have someone help. The job requires shutting off the water, removing the toilet, replacing the T-bolts and wax ring, securing the bowl, and flushing to test for leaks. Call a plumber for broken drain parts, sewage backup, or floor damage.

Should I Warm a Johni-Ring or Wax Ring in the Microwave Before Installing It?

No. A wax ring does not need to be microwaved to install correctly. Keep it clean, press it onto the toilet outlet, and seat the toilet with body weight and a slight twist.

Is There Paste or Adhesive Under a Toilet Wax Ring?

No. Do not put paste, plumber’s putty, adhesive, or caulk under the wax ring. The ring seals by compressing between the toilet outlet and the flange when the toilet is properly seated.

How Can I Tell Whether the Wax Ring Is Installed Correctly?

A correctly installed wax ring leaves the toilet stable, dry at the base, and free of sewer odor after flushing. The toilet should sit firmly on the floor without rocking, and water should not appear around the base during normal use.

Which side of a toilet wax ring goes up?

If your wax ring includes a plastic flange, orient that flange downward toward the floor drain. Attach the ring to the bottom opening of the toilet before lowering the bowl into place.

Can you install a toilet without a wax ring?

Not always. Replace the wax ring whenever you remove a toilet that uses one from its flange. The wax ring forms the watertight and airtight seal at that connection.