Leak detection across Wales: the towns we cover
Leak detection coverage includes every Wales CF postcode listed below, with the other postcode areas grouped by the country's 22 principal areas.

Non-invasive leak detection
Acoustic, thermal and tracer gas
Trace and access claim reports
Which Wales towns have their own leak detection page?
ADI Leak Detection Wales has a page for each of these towns.
Open a county or town page for local context, then give the office the property postcode and the access details needed to discuss a visit.
Water leak detection in Wales investigates hidden water loss in homes and business premises. The guide below brings together all 22 principal areas, often called counties, and the towns with their own ADI Leak Detection sites.
Choose a county for the wider area or a town for a closer description, then tell the advisor where the property is and what you have noticed.
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An island county with harbour settlements, detached homes and waterside villages beside the Menai Strait.
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Blaenau Gwent's three-valley setting and council-wide housing evidence within the Wales guide.
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Bridgend County Borough connects river valleys and varied homes within the Wales guide.
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Caerphilly County Borough's wider settlement pattern and housing evidence, distinct from the town page.
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The City and County of Cardiff entry explains the wider council geography within the Wales guide.
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Tywi countryside, historic settlements and employment centres across a varied Welsh county.
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Cardigan Bay coast, inland river valleys and Cambrian uplands, with historic town centres and university accommodation.
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A county borough spanning seaside settlements and the inland river landscapes around Trefriw and Betws-y-Coed.
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A county of varied household accommodation and river settlements, including Rhuddlan and Llangollen.
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A council area with substantial semi-detached housing, Alyn-side settlements and conservation-area buildings.
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A varied county with slate-industry settlements, hillside rows and the seaside development of Pwllheli.
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Merthyr Tydfil County Borough's Taff and Bargod Taf setting, with housing evidence beyond the main town.
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Monmouthshire's border and river geography gives this council-area entry its place in the Wales guide.
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Four valley systems and upland terrain, with traditional terraces, later estates and historic parks.
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Newport's Usk setting and historic urban fabric form a city-and-county reference in the Wales guide.
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Coastal towns, Cleddau waterway settlements and Preseli landscapes with contrasting historic building patterns.
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An upland, largely rural county with river valleys, historic properties and distinct water-service territories.
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Rhondda Cynon Taf brings urban, suburban and rural properties into one county entry in the Wales guide.
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The wider Swansea authority, from urban neighbourhoods to Gower and the northern Lliw Uplands.
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Torfaen connects industrial valley settlements and later planned development within the Wales guide.
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The Vale of Glamorgan adds coast, plateau and village housing context to the Wales-wide guide.
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The wider county borough, including Chirk's border setting and former mining housing at Rhostyllen.
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Abercarn's Ebbw valley setting and terraced housing, with details to prepare for a water leak enquiry.
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Abercynon brings canal and railway history into this guide to Welsh water leak enquiries.
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Aberdare brings river-valley geography and a historic centre to the Wales property guide.
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Abergavenny adds a Monmouthshire river setting and a varied housing mix to the Wales guide.
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A Conwy town combining a compact shopping centre with hills inland from the sea.
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Abersychan's Torfaen setting combines a neighbourhood centre with terraces and semi-detached homes.
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Abertillery's Ebbw Fach location, terraces and Victorian arcade inform a Wales-wide property enquiry.
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Abertridwr in the Caerphilly area, with combined-settlement housing figures and practical water leak enquiry details.
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Ceredigion coast: university accommodation, seafront streets and older town houses.
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Carmarthenshire town with independent shops, a college campus and a substantial semi-detached housing stock.
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Flintshire's sloping estuary-side settlement, with village facilities concentrated along High Street.
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Hillside housing and employment premises around Baglan Bay in Neath Port Talbot.
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Gwynedd's university city, set between Bangor Mountain and the Menai Strait.
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Bargoed's Rhymney Valley position, terrace-heavy housing profile and reused town-centre buildings in a Wales guide.
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Barry introduces a Bristol Channel town to the Wales guide, with parks and varied residential forms.
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Beddau's semi-detached housing, parks and local retail setting within the Wales water leak guide.
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Bedwas in south Wales, linking its residential mix with leisure and employment landmarks for property enquiries.
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Blackwood on the Sirhowy: housing and town-centre references for a Wales water leak enquiry.
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Blaenavon contributes an industrial heritage landscape to this guide's picture of Welsh properties.
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Blaina's upper-valley setting, terraces and industrial-land reuse in the Wales property guide.
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A Powys market town where the Usk and Honddu meet within Bannau Brycheiniog.
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Bridgend town adds a bridge-and-hill setting, residential areas and industrial premises to the Wales guide.
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Brynmawr's head-of-valleys location and market-town buildings, with property information for a Wales enquiry.
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The Wrexham village beside Moss Valley, with a civic centre and mixed housing.
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A Flintshire hill town whose brickmaking landscape now includes ponds, parks and housing.
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Harbour-side Carmarthenshire location between Mynydd Donny and the Loughor estuary.
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Caerleon provides a River Usk setting within Newport for this Wales-wide property guide.
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Gwynedd's castle and harbour town, with historic streets and later estate housing.
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Caerphilly town at the southern Rhymney Valley, with castle-side context and a varied housing profile.
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Caldicot adds a Monmouthshire estuary-side setting, housing and employment locations to the Wales guide.
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Cardiff's capital-city role, bay landmarks and varied housing anchor its entry in the Wales guide.
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Towy-side market town with historic terraces, university accommodation and varied housing.
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A Wrexham-area hillside settlement above the Dee Valley, with irregular historic housing rows.
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Chepstow's Welsh bank of the Wye gives this Monmouthshire entry a clear place in the Wales guide.
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Church Village's residential mix and community facilities help locate a water leak enquiry within Wales.
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Swansea-area village with canal-side green space and a core of older terraces.
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Wrexham-area hillside village with sandstone and brick buildings, plus distinct water and sewerage providers.
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Conwy's coastal town rises from the beach towards wooded slopes and mixed-use streets.
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A Flintshire town on the Dee, with Wepre Park and a largely house-based accommodation mix.
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The walled town beside the Conwy Estuary, with later terraces inside a medieval street plan.
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Carmarthenshire housing alongside business parks, food-sector premises and retail development.
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Afan valley settlement with housing on both riverbanks and surrounding hills.
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Cwmbran represents post-war planned development within this guide to water leak enquiries across Wales.
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Denbighshire's castle town, with streets descending from the walls towards the wider settlement.
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Dinas Powys contributes village-centre and river context to the Vale of Glamorgan entries in this Wales guide.
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Ebbw Vale's upper-valley terraces and former steelworks redevelopment within the Wales property guide.
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A Flintshire estuary town where the castle setting sits alongside several periods of housing development.
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Swansea-area town near the Loughor estuary, with older High Street terraces and later residential redevelopment.
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Gateway to Gower within Swansea’s council area, with homes shaped by an industrial residential past.
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Wrexham-area village with a historic core above the Alyn valley and predominantly detached accommodation.
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A Wrexham-area settlement beside the wooded and riverside landscape of Alyn Waters.
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Pembrokeshire river town with a steep historic core, conservation fabric and employment premises at Withybush.
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A Flintshire village above the Cheshire plain, with stone terraces and a historic residential library.
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Anglesey's Holy Island port town, combining a historic commercial centre with terraced housing.
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A Flintshire town linked to the Greenfield Valley's historic water-powered industry.
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Conwy's coastal settlement west of the Clwyd, with bungalows and a surviving dune strip.
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The Flintshire village with aircraft manufacturing and a major retail setting beside its homes.
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Monmouth's meeting of rivers supplies a distinct Monmouthshire setting within the Wales property guide.
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A Powys spa-town setting with registered public parks, Victorian terraces and a notable flat-based housing component.
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A Conwy seaside resort framed by limestone headlands, with seafront hotels and extensive flat-based accommodation.
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Carmarthenshire coastal town with terraced housing, conservation streets and major retail locations.
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Anglesey's county town on the Cefni, with a wooded riverside and varied historic frontages.
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Llanharan's traditional square and wider residential mix give local detail to a Wales water leak enquiry.
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Llantwit Major links a historic core and coastal valley within the Wales guide's Vale of Glamorgan entries.
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Wrexham-area model-village heritage, semi-detached housing and employment sites near the Alyn.
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Estuary settlement in Swansea’s council area, with a castle, workers’ housing and later residential estates.
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Maesteg brings Llynfi Valley housing and a town-centre market into this Wales-wide enquiry guide.
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Magor's Severnside village setting adds a distinct Monmouthshire perspective to the Wales guide.
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Merthyr Tydfil town at the head of the Taff valley, with terraced housing and historic landscape context.
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Pembrokeshire waterway town combining Georgian terraces with waterfront homes, offices and working premises.
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A Flintshire town whose planned historic streets extend below Bailey Hill beside the Alyn.
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Mountain Ash beside the Cynon, with a terrace-led housing profile and park and employment references.
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Flintshire residential settlement with 1970s estate growth, detached homes and a local centre at Mercia Drive.
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Nantyglo's valley-side industrial landscape adds a Blaenau Gwent setting to the Wales property guide.
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River Neath town with a historic commercial centre, indoor market and substantial terraced and semi-detached housing.
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Newbridge in Caerphilly, with terraced housing and a dated civic landmark to distinguish the Welsh town.
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A Powys town in the Severn valley, with textile-era housing and later planned expansion.
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Oakdale supplies a planned hilltop-village example within the Wales guide's Caerphilly entries.
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Planned dockyard town on Pembrokeshire’s waterside, with terraced streets and rising ground towards Pennar.
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Historic ridge-top town above Mill Pond, with medieval plots and a mix of homes and businesses along Main Street.
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Penarth brings waterfront geography and a substantial flat housing share to the Wales property guide.
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Pencoed adds a Bridgend County Borough town and its local-service centre to the Wales guide.
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Tawe valley town with canal-side surroundings, college premises and named industrial and business estates.
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Swansea-area town beside the Loughor and Dulais, with tinplate history and a district shopping centre.
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Pontllanfraith's Sirhowy setting and predominantly semi-detached housing within a Wales-wide property guide.
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Pontyclun brings a two-river meeting and later settlement growth into the Wales property guide.
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Pontypool's park, market and residential mix supply a Torfaen setting within the Wales guide.
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Pontypridd's Taff-side development, terraces and central park in the Wales property guide.
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Porthcawl introduces a coastal Bridgend County Borough setting to the Wales-wide property guide.
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Porth at the meeting of the Rhondda valleys, with terraced housing and local property references.
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Swansea Bay coastal town with post-war housing, established terraces and the historic landscape at Margam.
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A Denbighshire seaside town below wooded slopes and limestone outcrops.
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Pyle adds residential and industrial premises in Bridgend County Borough to this Wales guide.
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Rhoose provides a coastal-plateau village setting within the Wales guide's Vale of Glamorgan entries.
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A Wrexham-area village with mining-led growth, converted commercial buildings and reclaimed public parkland.
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A Denbighshire seaside town with planned Victorian streets, converted boarding houses and coastal recreation landmarks.
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Rhymney's upper-valley position and industrial premises add Caerphilly context to the Wales guide.
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Risca between river and canal, with terraced housing and a reused cinema building in the Wales guide.
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Rogerstone adds canal heritage and a largely detached housing mix to the Wales guide's Newport entries.
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A Denbighshire town combining historic domestic buildings with the lower Clwyd river setting.
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Sarn's Bridgend identity and river-meeting setting distinguish this entry within the Wales property guide.
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A Flintshire town shaped by railway and industrial growth, with older terraced streets above the coastal railway.
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Coastal city with varied quarters, university accommodation, converted historic houses and substantial terraced housing.
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Tonypandy's river junction, period streets and extensive terraced housing profile within the Wales guide.
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Tonyrefail at the head of the Ely, with a varied residential mix and local open-space references.
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Tredegar's planned historic centre and Sirhowy setting, with residential and employment context for Wales enquiries.
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Treharris introduces steep valley geography and industrial-era settlement context to the Wales guide.
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Treherbert brings a Rhondda Fawr valley-head settlement and strongly terraced housing pattern into the Wales guide.
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Treorchy's Rhondda Fawr location and strongly terraced housing profile in the Wales guide.
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A Powys valley town crossed by the Montgomery Canal, with historic terraces and nearby industrial premises.
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A Welsh city with historic commercial streets, residential suburbs and a substantial industrial setting.
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Ynysybwl adds a local river meeting and colliery-settlement history to this Wales property guide.
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Upper Swansea Valley settlement on the Tawe, with hillside surroundings and an iron, tinplate and coal history.
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Ystrad's Rhondda Fawr identity, with carefully distinguished Census geography and local leisure references.
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Ystrad Mynach in the Rhymney Valley, with housing, reclaimed landscape and employment context for Wales enquiries.
Who fixes a leak on your supply pipe in Wales?
Responsibility for a supply pipe changes at the property boundary. Which water company serves your property depends on your town, and each town page names it, its leak line and its published guidance.
Is leak detection available between the Wales towns?
A Welsh property can sit outside the settlements named in this guide. Give the office its postcode, nearest settlement and access details so the location can be checked when arranging an investigation.
The example postcode districts identify parts of the 22 principal areas; a boundary or place name alone does not describe the property supply or the route to its pipework. Contact the team about your postcode
- LL77
- NP23
- CF31
- CF83
- CF10
- SA31
- SY23
- LL32
- LL16
- CH7
- LL55
- CF47
- NP25
- SA11
- NP20
- SA61
- LD1
- CF37
- SA1
- NP44
- CF62
- LL13
Is leak detection available at your postcode?
Give us your postcode and a technical advisor will confirm the engineer who covers it.
Same or next day depending upon engineer availability.
