Leak Detection in Bangor
Bangor's housing stock is split between Victorian and Edwardian properties and newer postwar homes — all relying on Welsh Water's combined sewerage system where surface water and foul water share the same pipe. That design puts old copper pipework and clay drains under pressure, especially as the acidic water here accelerates corrosion. Hidden leaks in properties across LL57, LL58, LL59 and LL60 often go undetected until they've caused structural damage.
We use acoustic loggers, thermal imaging, and tracer gas to find hidden leaks in Bangor without digging up floors. Particularly useful for pin-hole corrosion in older copper pipes — common in LL57–LL60 where Welsh Water's soft water accelerates joint failure.
Drainage in Bangor — what local engineers know
Bangor's combined sewer network (managed by Welsh Water under Gwynedd Council) handles both foul and surface water in the same pipes — a setup that increases blockage and surcharge risk during heavy rain. With over a third of local properties built before 1920, salt-glazed clay drains and lead-soldered copper are the norm. The slightly acidic pH of Welsh Water's soft supply accelerates pin-hole corrosion in those older copper joints. A pinhole leak can weep for weeks before you notice pooling under floorboards or soft patches in walls. Flood risk in Bangor itself is low, but the combined system's surcharge potential means water backing up into homes is a real threat during storm events.
- Soft water supply reduces limescale, but slightly acidic pH can accelerate corrosion of copper fittings and lead joints in older Bangor properties
- Combined sewerage infrastructure — common in older parts of Bangor — means foul and surface water share the same pipe, increasing surcharge risk during heavy rainfall
- Ageing infrastructure in parts of Bangor means drain blockages from grease, wipes and root ingress remain the most common call-out reasons
- With 36% of properties built before 1920, salt-glazed clay drainage and lead-solder copper pipework are common — pipe collapse, root ingress and joint failure are recurring call-out drivers.
What happens when you call us in Bangor
- 1 Immediate dispatch. We find the nearest available engineer covering LL57/LL58 and confirm the ETA before the call ends.
- 2 On-site diagnosis — no guessing. The engineer inspects using professional-grade equipment including CCTV where needed and quotes a fixed price before work starts.
- 3 Job complete, report issued. You receive a written completion report. All work is guaranteed — same fault returns within the guarantee period, we come back free.
Who's responsible for drains in Bangor?
In Bangor, responsibility for a blocked or damaged drain depends on where the fault sits. As a homeowner you are responsible for the drains within your property boundary that serve only your home. Since the 2011 private sewer transfer, Welsh Water is responsible for shared sewers and lateral drains beyond your boundary — even where they run under private land. Road gullies and highway drainage are maintained by Gwynedd.
This matters because it determines who pays. If our engineer's CCTV inspection shows the fault is in a shared sewer, we'll tell you — and you can report it to Welsh Water rather than paying for the repair yourself. The combined sewer layout that dominates Bangor affects where these boundaries typically fall, and our local engineers know the LL57, LL58, LL59 networks well enough to identify ownership quickly.
Leak Detection prices in Bangor
Every Bangor job is quoted as a fixed price before work starts — what we quote is what you pay, with no call-out fee for providing the quote. The final price depends on access (an external inspection chamber is quicker than internal-only access), the pipe material and condition , and how established the blockage or fault is. Request your free quote and we'll confirm the price and your engineer's ETA in the callback.