Drainage leak detection and CCTV surveys in Bangor
Drainage leak investigation identifies drain defects using a CCTV drain survey and acoustic listening.
Non-invasive leak detection
Acoustic, thermal and tracer gas
Trace and access claim reports
What are the signs of a drainage fault?
A drain smell, slow or gurgling toilets and gullies, or sinking ground near a chamber can indicate a fault. ADI Leak Detection Bangor locates the cracked, collapsed or root damaged section and reports its position.
A drain fault is out of sight underground, so these signs are usually the first warning:
- A drain smell in the garden or in a downstairs room
- Gullies and toilets that empty slowly or gurgle
- Repeated blockages in the same run of pipe
- Ground sinking near an inspection chamber or a soil pipe
- Rats, which follow broken drains
Where do drainage faults occur in Bangor?
Drainage leak investigation in Bangor checks suspected escapes from waste pipes or drains serving a property.
- Dŵr Cymru Welsh Water operates the local sewerage network. For premises near Deiniol Shopping Centre, whose operator locates it beside the bus station, describe the affected unit and any chamber that can be reached.
- The team can discuss tests around the reported discharge and wet area. If a neighbouring occupier controls access to part of the route, include that information when arranging entry.
- The Afon Adda runs underground through Bangor for four kilometres, according to the council's Hirael project account. The account records earlier culvert restrictions and flood-alleviation works completed in 2008, supplying drainage history for the city without diagnosing a defect in any private pipe.
How does ADI Leak Detection Bangor find a drainage fault?
The engineer opens the inspection chambers, runs a CCTV camera along the drain and locates the defect with the camera's sonde. Once the position is found, the engineer explains it on site before any repair is discussed.
The inspection chambers reveal the drain layout when their covers are lifted, before the camera survey starts.
A CCTV drain camera records the condition of every joint, bend and connection as it travels through the pipe.
The camera sonde, tracked from the surface, gives the position and depth of the drain defect on the ground above.
Acoustic listening and water testing confirm whether a defect is actually losing water.
The drain condition report includes the survey video, still images and a plan of the pipe run.
What happens after a drainage fault is found?
The drain defect is located, marked and reported with the CCTV footage. Drain repairs and lining are carried out by a drainage contractor, working from the survey.
Every leak detection visit ends with a written report by the engineer who attended, with photographs and video, formatted for trace and access and escape of water insurance claims.
- The leak position marked on site and explained before you decide anything
- Photographs and video in the written report
How do you arrange drainage leak investigation in Bangor?
Send the form with your postcode and a technical advisor will call you back, confirm the service and book the visit.
If you are unsure which investigation you need, describe what you can see when you call and the advisor will tell you.
Same or next day depending upon engineer availability.
What do people ask about drainage leak investigation?
Before a drainage investigation people ask how long it takes, how it differs from a CCTV survey, what happens with a shared drain and whether drains get unblocked.
How long does a drainage leak investigation visit take?
It depends on the property and how much of the system has to be tested, so the advisor gives you an estimate when you book.
Is a CCTV drain survey the same as leak detection?
A CCTV drain survey is the drainage form of leak detection. The camera shows the pipe condition and the sonde locates the defect, giving your repair contractor the information needed to plan the work.
Who is responsible for a shared drain?
Pipes serving more than one property, or serving a single property outside its boundary, are probably Welsh Water’s responsibility. Pipes serving only your property within its boundary are your responsibility.
Source: Dŵr Cymru Welsh Water guidance, checked 4 November 2026.
Does ADI Leak Detection unblock drains?
Clearing enough of a blockage to get the camera through is part of the survey. Full drain clearance, repair and lining is a drainage contractor’s work.
