General Plumbing Repairs

Overflow Repair

Overflow repair fixes leaks and faults in bath, basin, and toilet cistern overflow systems so water drains safely and does not damage floors, ceilings, or surrounding fittings. The service focuses on accurate diagnosis, reliable component replacement, and proper testing to confirm the overflow works as intended.

More information

What overflow repair covers

Overflow problems are often caused by worn seals, loose connections, damaged overflow plates, or issues within a cistern overflow assembly. This service is designed to locate the cause and restore safe, watertight operation.

  • Diagnose the source of leaks, drips, or poor overflow performance
  • Isolate the water supply where required and work safely around existing fittings
  • Repair or replace faulty overflow components (including seals, washers, pipework connections, and fittings)
  • Check for related issues around the waste, trap, and pipe joints
  • Test the overflow and surrounding connections to confirm correct operation

When this service is most useful

Book an overflow repair if you notice water marks, damp patches, or staining near a bath panel, basin pedestal, or ceiling below a bathroom. It is also suitable when the overflow does not take water away properly, or when a cistern overflow arrangement is running or dripping.

Landlords and small commercial premises often use this service to address reported leaks quickly and reduce the risk of property damage and disruption.

How the repair is carried out

The work typically starts with a visual inspection and targeted testing to confirm whether the issue sits with the overflow itself or a nearby waste connection. If needed, the water is isolated, defective parts are removed, and compatible replacements are fitted to achieve a watertight seal.

You will be told what has failed, what needs changing, and what testing will be done before the job is completed.

After the repair

Once repairs are complete, the overflow is tested under controlled conditions to confirm it drains correctly and does not leak at the joints. You will also get practical advice on what to watch for, plus any recommended next steps if there are signs of hidden moisture, damaged seals elsewhere, or ageing fittings that may fail soon.

Frequently Asked Questions

What are the signs that an overflow needs repair?
Common signs include drips under the bath or basin, staining or damp on the ceiling below, or water appearing only when the water level is high. You might also notice a loose overflow grille or a musty smell from persistent moisture.
Can I keep using the bath or basin if the overflow is leaking?
It is best to avoid filling the fixture to the overflow level until it is repaired. Use short, low-water runs and monitor for leaks, as even small drips can cause damage over time.
Will you need to replace the whole bath, basin, or cistern?
In most cases, no. Overflow faults are usually resolved by replacing seals, fittings, or sections of pipework, while keeping the main fixture in place. If a component is obsolete or damaged beyond repair, you will be advised on the most practical option.
What if the leak is not coming from the overflow?
The first step is diagnosis, as leaks can also come from the waste, trap, taps, or pipe joints nearby. If the overflow is not the cause, you will be told where the leak is originating and what repair is needed to resolve it.
Do you normally complete overflow repairs in one visit?
Many overflow repairs can be completed in a single visit, provided access is straightforward and suitable parts are available. If access is restricted or a specialist component is needed, you will be informed of the next steps before any further work is arranged.

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