Toilet Not Sitting Flush with Floor

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Quick answer
Confirm the symptom
Tools and prep
Step-by-step troubleshooting
Common causes table
Parts matching
When to call a pro
FAQ
Related guides

Quick answer

To fix a toilet not sitting flush with the floor, start by checking the floor bolts and wax ring. Tighten or replace the bolts if loose, and ensure the wax ring is intact and properly seated. If the toilet remains uneven, adjust the flange or replace the wax ring for a secure fit.

Confirm the symptom

Toilet wobbles when sat on or touched
Gap between toilet base and floor is visible
Water leaks around the base after flushing

Tools and prep

Adjustable wrench or pliers
Screwdriver (flathead or Phillips, depending on bolts)
New floor bolts (if needed)
New wax ring (if needed)
Towel or rag
Safety gloves
Bucket (to catch water if needed)

Step-by-step troubleshooting

Turn Off Water Supply
Do: Locate the water shut-off valve behind the toilet and turn it clockwise to stop the water flow.
Observe: Water stops flowing into the tank.
Means: The toilet is ready for maintenance without water entering the tank.
Next: Drain the toilet.
Drain the Toilet
Do: Flush the toilet to empty the tank and bowl. Use a towel or rag to soak up any remaining water in the bowl.
Observe: Tank and bowl are mostly dry.
Means: Water is drained, reducing the risk of spills during the repair.
Next: Remove the toilet.
Remove the Toilet
Do: Use an adjustable wrench or pliers to loosen and remove the nuts from the floor bolts. Carefully rock the toilet back and forth to break the seal with the wax ring, then lift it off the flange.
Observe: Toilet separates from the flange with some resistance from the wax ring.
Means: The toilet is disconnected and ready for inspection or adjustment.
Next: Inspect the flange and bolts.
Inspect the Flange and Bolts
Do: Check the flange for damage or misalignment. Ensure the floor bolts are not bent or corroded. Replace any damaged components.
Observe: Flange is level with the floor and bolts are in good condition.
Means: The toilet can be reinstalled securely if the flange and bolts are intact.
Next: Install a new wax ring.
Install a New Wax Ring
Do: Place a new wax ring on the flange or the bottom of the toilet base, depending on the type of wax ring you're using.
Observe: Wax ring is evenly seated and covers the flange opening.
Means: The wax ring is ready to create a watertight seal between the toilet and flange.
Next: Reinstall the toilet.
Reinstall the Toilet
Do: Carefully lower the toilet onto the flange, aligning the bolts with the holes in the base. Press down firmly to seat the wax ring, then secure the nuts onto the bolts.
Observe: Toilet sits level with the floor and is securely fastened.
Means: The toilet is properly reinstalled and should no longer wobble or leak.
Next: Turn on the water supply.
Turn On the Water Supply
Do: Slowly open the water shut-off valve to refill the tank.
Observe: Water flows into the tank and bowl without leaking.
Means: The toilet is ready for use and the repair is complete.
Next: Test the toilet.
Test the Toilet
Do: Flush the toilet several times and check for any leaks around the base.
Observe: No water leaks and the toilet remains stable.
Means: The repair was successful and the toilet is functioning properly.
Next: Final inspection.
Final Inspection
Do: Ensure the toilet is level with the floor and there are no gaps between the base and the floor.
Observe: Toilet is stable and flush with the floor.
Means: The issue has been resolved and the toilet is safe to use.
Next: Complete

Common causes

Cause	Likelihood	Difficulty	Part often needed
Loose or damaged floor bolts Floor bolts that are loose or damaged can cause the toilet to shift or wobble, leading to an uneven fit with the floor.	Common	Easy	Floor bolts
Worn or improperly installed wax ring A damaged or improperly seated wax ring can cause the toilet to sit unevenly and may lead to leaks.	Common	Easy	Wax ring
Damaged or misaligned flange A flange that is cracked, broken, or not level with the floor can prevent the toilet from sitting flush.	Sometimes	Medium	Toilet flange repair kit
Uneven or damaged floor surface If the floor around the toilet is uneven or damaged, the toilet may not sit level, causing wobbling or gaps.	Rare	Hard	Floor repair materials
Improper installation If the toilet was not installed correctly, it may not sit flush with the floor, leading to instability and leaks.	Sometimes	Medium	Wax ring, floor bolts
Settling of the home Over time, the settling of a home can cause the floor to shift, leading to an uneven toilet fit.	Rare	Hard	Floor leveling compound
Incorrect toilet size or model Using a toilet that is not the correct size or model for the flange can result in an uneven fit.	Rare	Hard	Replacement toilet
Corrosion or rust on floor bolts Corroded or rusted floor bolts can weaken and cause the toilet to shift or wobble.	Sometimes	Easy	Floor bolts

Parts matching

Here are the most common parts needed to fix a toilet not sitting flush with the floor:

Floor bolts: Used to secure the toilet to the flange. Replace if loose or damaged.
Wax ring: Creates a watertight seal between the toilet and flange. Replace if worn or improperly installed.
Toilet flange repair kit: Repairs or replaces a damaged or misaligned flange.
Toilet shims: Used to level the toilet if the floor is slightly uneven.
Floor leveling compound: Fills in uneven areas of the floor to create a level surface for the toilet.

Always use a high-quality wax ring and ensure it is properly seated to prevent leaks and ensure a secure fit.

When to call a professional

The flange is severely damaged and cannot be repaired.
The floor is significantly uneven and requires professional leveling.
You are unable to secure the toilet properly after replacing parts.
There are persistent leaks after reinstallation.
You are unsure about the correct installation process or safety concerns arise.

FAQ

How do I know if my wax ring needs to be replaced?

If your toilet is wobbling or there are water leaks around the base, the wax ring may be damaged or improperly installed and should be replaced.

Can I reuse the floor bolts when reinstalling the toilet?

It is not recommended to reuse old floor bolts as they may be stretched or weakened. Replace them with new ones for a secure fit.

What should I do if the toilet still wobbles after reinstallation?

Check the flange for damage or misalignment. If the flange is level, use toilet shims to level the toilet before securing it with new floor bolts.

How often should I check the toilet's stability?

It is a good idea to check the toilet's stability every few years or if you notice any wobbling or leaks.

Can I use silicone instead of a wax ring?

While silicone sealant can be used in some cases, it is not a substitute for a wax ring. A wax ring provides the necessary watertight seal between the toilet and flange.