Start here: is it leaking right now?
A crack that weeps water onto the floor is an active leak. Close the shutoff valve behind the toilet by turning it clockwise, flush once to empty the tank, and soak up standing water. Do not use the toilet again until a plumber has looked at it.
If the crack is hairline and dry, you have time to decide. The answer is almost always replacement, because porcelain does not heal. Our toilet repair team can tell you whether a part or the whole fixture is the right fix.
Where the crack is changes the answer
Tank crack
A crack in the tank wall is a leak waiting to grow. Tanks hold the most water, so failure can be sudden.
Bowl crack above the waterline
It may stay dry, but it can spread. A sealant patch is temporary at best.
Bowl crack below the waterline
Water will find it. Replacement is the realistic answer.
Base or flange crack
The bowl may rock or leak at the floor. A broken flange also needs repair.
Chip or surface craze
Cosmetic only if it does not go through the glaze. Watch it, but it often needs no action.
What sealants and epoxy actually do
Waterproof epoxy and porcelain repair kits can fill a small crack and hold for a while. They bond to the surface, but the toilet flexes with every flush and every person who sits on it. Over time the bond breaks, and the crack may open wider.
If you try a patch, use it as a bridge while you shop for a new toilet, not as a repair. Clean and dry the crack, apply the product as directed and keep an eye on the floor.
Do not use a patch on a crack that sits under the seat or at a bolt hole. Those spots carry load, and a patched crack there can give way when someone sits down. If the crack goes through the glaze and you can feel water behind it, plan to replace the fixture rather than relying on a bond that depends on a clean, dry surface.
| Condition | Patch it? | Better choice |
|---|---|---|
| Hairline craze, glaze only | Not needed | Monitor it |
| Dry hairline in tank | Short term only | Replace tank or toilet |
| Crack that leaks | No | Shut off water, replace |
| Crack near the base | No | Replace and check flange |
| Rocking bowl, no crack | No | Reset with new wax ring |
| Old toilet with multiple issues | No | Replace whole unit |
Local note
Local note: cold snaps and idle bathrooms
The record low at Atlantic City International Airport is -11 F, per NOAA normals, and seasonal snowfall typically runs 12 to 18 in.
What that means for you: a seasonal rental or closed-up unit with no heat can freeze water standing in the tank or bowl, which can crack porcelain. If a bathroom will sit cold, shut off the supply and drain the tank and bowl.
Found a crack and not sure how serious it is? Call and tell us where it is.
Call (609) 547-1417Safe steps when you find a crack
- Close the shutoff valve behind the toilet and flush to empty the tank.
- Sponge out the remaining water in the bowl and tank so a cracked part is not holding weight.
- Wipe the crack dry and take a photo with a coin or ruler for scale.
- Check the floor around the base with a dry paper towel for dampness that suggests a slow leak.
- Keep children away from the fixture, since a cracked bowl can break under a person's weight.
Sharp porcelain edges can cut. Wear gloves if you handle broken pieces, and set them aside for the plumber.
When replacement is the right call
Replace the toilet when the bowl or trap is cracked, when the tank has a crack through the wall, or when the fixture is old and has needed several repairs. Replacement also lets you fix related problems, such as a rusted flange bolt, a failing shutoff valve or a rotted subfloor.
A tank crack on an otherwise sound bowl may be a candidate for a new tank, but matching parts to old models can be hard. Many owners find a full replacement cleaner. If it is a rental or a unit you manage, delaying risks water damage to the unit below.
What a replacement visit involves
From old toilet to new
- 1
Shut off and drain
We close the supply, empty the tank and bowl, and disconnect the supply line.
- 2
Lift and inspect
The bowl is removed, and the flange and floor are checked for rot or damage.
- 3
Prepare the flange
A damaged flange is repaired, and a new wax ring or seal is set.
- 4
Set the new toilet
The bowl is lined up, bolted down evenly and caulked at the base if appropriate.
- 5
Test
We reconnect the supply, flush several times and check for leaks at every joint.
Planned replacement is usually less costly than an emergency visit. Price depends on the toilet, floor condition and access, and we give a clear price before work starts.
Other reasons a toilet seems cracked
Hard water stains, glaze crazing and hairline scratches can look like cracks. Run a fingernail across it. A true crack catches the nail, and water seeps into it. If you cannot tell, a plumber can look quickly. For a toilet that clogs and overflows, drain cleaning may be the more pressing fix.
We also serve nearby towns. Homeowners in Absecon and Ventnor City reach the same 24/7 line, and we offer same-day appointments when available. We are licensed and insured.
Check the tank lid and the seat bolts as well. A cracked lid is cheap to replace and does not mean the fixture is failing. Overtightened tank bolts are a common cause of cracks at the bottom of the tank, so if a previous owner cranked them down, look closely around those bolts.
Quick answers
You can try, but epoxy is a temporary patch. The crack will flex with use and may reopen. Use it only while you arrange a replacement, and shut off the water if the crack leaks.
It can be. A tank holds several gallons, and a crack may widen suddenly and flood the floor. Shut off the supply at the valve if you see water or a growing crack.
Policies usually cover sudden and accidental water damage but not wear or maintenance. A cracked toilet from age may not be covered, while a sudden flood may be. Ask your insurer.
A true crack catches a fingernail and may let water seep through. Stains and crazing sit in the glaze and wipe or feel smooth. If you are unsure, take a photo and call us.
Yes, if water sits in a cold, unheated bathroom. Atlantic City's NOAA record low is -11 F, so seasonal rentals and closed units should have the supply shut off and the tank drained. Our burst pipe repair page covers frozen lines.
We offer same-day appointments when available. For an active leak, call the 24/7 line and shut off the supply valve first.