Match what you notice
- The cistern takes longer to fill or stops at a low level
- A flush can be weak if it happens before the cistern has finished refilling. If the cistern stays low or every refill takes longer than usual, we check the water supply, the isolation valve where fitted and the fill valve.
- The cistern is full but little water enters the bowl
- The flush valve may be obstructed, faulty or opening only part way. If one button on a dual-flush toilet has changed while the other still works as usual, tell us which one. Depending on the model, we can check the button and the mechanism that operates the valve.
- Water enters the bowl but leaves one area poorly washed
- On older pans with openings under the rim, limescale can restrict where water enters. Rimless pans direct water differently. Tell us whether the pattern has changed and which part of the bowl is being missed.
- Water enters the bowl but rises and is slow to go away
- This points to a possible restriction in the pan or waste pipe. Leave the toilet out of use. Tell us if nearby sinks or showers also drain slowly, gurgle or back up. This helps us work out where to look for a blockage.
What to tell us before a visit
Say whether the last flush sounded weaker, whether the cistern now takes longer to refill, and whether the bowl water rose. If it is safe, send a photo of the toilet and the flush button or plate. Tell us if the cistern is visible, inside furniture or behind a wall. Leave concealed panels in place.
What AquaFix can check
We check whether the cistern fills, how it releases water, how the flow reaches the bowl and how the waste drains. If we confirm a faulty flush valve, we can replace it with a compatible part. For concealed cisterns, the model and access can affect which part we need and how we reach it.
Read about blockages that affect one outlet or several
Further reading
- Kohler troubleshooting for a poor toilet flush
- Kohler explanation of restricted rim openings and poor bowl wash
- Fluidmaster UK example of a dual-button cable-operated flush valve