How to Fix a Toilet Tank Leak
Quick Answer
Identify the crack, drain the tank, apply a two-part epoxy sealant over the crack, or replace the tank entirely.
How to troubleshoot a Toilet Tank Leak
A crack in the toilet tank can cause a leak. This guide covers replacing the tank or using a sealant for hairline cracks.
Step-by-Step Fix
- Turn off the water supply and flush the toilet to drain the tank completely.
- Dry the tank completely and inspect the crack to determine its severity.
- For hairline cracks, apply a two-part epoxy over the crack and allow it to cure.
- For larger cracks, you must replace the tank or the entire toilet.
- Reattach the water supply and turn the water back on slowly.
- Check for leaks and flush the toilet several times to test the repair.
Common Error Codes
| Code | Meaning | Resolution |
|---|---|---|
| Epoxy leaks | Crack not sealed completely | Sand and reapply epoxy over a wider area. |
| Tank still leaks after epoxy | Crack is too large | Replace the tank with a new one. |
Frequently Asked Questions
Can I repair a cracked toilet tank myself?
Hairline cracks can be repaired; larger cracks require a new tank.
How long does epoxy take to dry on a toilet tank?
24 hours for full curing before refilling with water.