Fixing leaks, running cisterns and flush faults, or fitting a new WC
Toilet Repair and Replacement
Toilet repair and replacement covers fixing a leaking, running or poorly flushing toilet — typically a worn cistern valve, seal or flush mechanism — or removing the existing pan and cistern and fitting a new WC, including close-coupled, back-to-wall or wall-hung units.
Definition
What Toilet Repair covers
Toilet faults are most commonly a worn fill or flush valve causing a running cistern, a failed pan connector or seal causing a leak at the base, or a cracked cistern or pan. Repair addresses the specific worn part; replacement swaps the whole unit, which is often the better option on an older toilet or where a style change (such as moving to a wall-hung unit) is wanted.
Suitable for
- A toilet that won't stop running or refilling
- A leak at the base of the pan or behind the cistern
- A weak or inconsistent flush
- Replacing an old or damaged pan and cistern with a new WC
Not suitable for
- Moving a toilet to a new position, which usually needs new below-floor drainage and is scoped as part of a bathroom project
- Toilets affected by a blocked soil pipe or drain, which needs clearing before any repair is diagnosed
Process
How the work is carried out
- 01
Diagnosis
Identifying whether the fault is the fill valve, flush valve, seal, or the pan or cistern itself.
- 02
Isolating the supply
Turning off the water supply to the cistern before work starts.
- 03
Repair or fit
Replacing the faulty part, or removing the old WC and fitting the new pan, cistern and connections.
- 04
Testing
Checking the flush, fill level and for leaks at all connections before finishing.
Typical timescale
A repair is usually completed within an hour or two on a single visit; a full pan and cistern replacement typically takes half a day, depending on the condition of the existing soil pipe connection and floor.
Cost guidance
Toilet repair or replacement typically costs £70–£200 per job in our area, with straightforward repairs — a new fill or flush valve, or a reseal — at the lower end, and full replacement of the pan and cistern at the top of the range. We provide an itemised quotation after inspection rather than a fixed headline price.
Limitations and exclusions
- The new WC itself is supplied to your specification unless a supply-and-fit package is agreed
- Faults in the underlying soil pipe or drainage run are diagnosed and quoted separately
Areas we cover
Toilet Repair across Sussex, Surrey, Kent and South London
Local property styles, planning authorities and neighbourhood coverage for toilet repair in each town we work in.
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FAQs
Toilet Repair FAQs
Why does my toilet keep running after I flush?
This is almost always a worn fill or flush valve failing to seal properly, letting water continue to trickle into the pan. It's a straightforward repair in most cases and wastes a significant amount of water if left.
Is a leak at the base of the toilet serious?
It usually means the seal (the pan connector) between the toilet and the soil pipe has failed, which can let water track into the floor below over time. It's worth having looked at promptly rather than left.
Can you fit a wall-hung toilet in place of my existing floor-standing one?
Yes, though it usually needs a concealed cistern frame fitted behind the wall, which is more involved than a like-for-like swap — we confirm what's feasible on survey.
Discuss your toilet repair project
Tell us about the property and what you have in mind, and we'll arrange a site visit.
Last reviewed 2026-07-28.