GETTA Help
Toilet keeps running: causes and what to do
A toilet that continues running after a flush is often allowing water to pass through the cistern instead of shutting off. It wastes water and can become more disruptive, but the pattern you observe can help a plumber narrow it down.
Work out what is happening
- Listen for constant filling and look for a steady trickle into the bowl.
- Notice whether gently moving the flush button changes the flow.
- If the cistern has an accessible lid designed to lift off, a visual check may show whether the water level is unusually high. Do not force concealed panels or fittings.
Common possibilities
The inlet valve may not be closing, the float may be obstructed or incorrectly set, or the flush valve seal may no longer close properly. A sticking button or linkage can also hold the flush mechanism open. The exact arrangement varies between toilets.
Limit the water if necessary
If water is close to overflowing or the flow is substantial, use the toilet’s accessible isolation valve only if you can identify and operate it safely. Do not force a seized valve. Avoid flushing again until the problem is understood.
When to call a plumber
Get help if the toilet will not stop filling, water is escaping onto the floor, the isolation valve does not work, or the cistern is concealed and not safely accessible. Note the toilet type, where the water is flowing, and whether the problem began after a flush or repair.