A puddle that keeps reappearing around the base of the toilet is easy to wipe away and ignore — but every flush may be seeping dirty water into your floor. Here is what causes it and why it needs sorting.
The usual causes
- A failed seal — the wax or rubber seal between the toilet and the waste pipe has degraded, letting water escape with each flush. The most common cause.
- Loose floor bolts — if the toilet rocks, it breaks the seal and weeps at the base.
- Condensation — in humid weather the cistern can sweat and drip down, mimicking a leak.
- A cracked pan — less common, but a hairline crack leaks at the base.
Why not to ignore it
A base leak releases contaminated water every flush, rotting flooring and subfloor and creating odour and hygiene problems. It does not fix itself — the seal only degrades further.
Condensation or leak?
Dry everything and watch. Water only in humid weather, dripping from the cistern, is condensation. Water that returns at the base after each flush is a seal leak.
The fix
Tightening the bolts helps if the toilet rocks, but a failed seal means lifting the toilet, replacing the seal and re-seating it level and watertight — best done by a plumber. See toilet repairs or book a fix before it reaches your floorboards.