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Water connection application

A water connection application is made to the wholesaler for your postcode under section 45 of the Water Industry Act 1991, or to your retailer where the site already has a SPID: this tool names the wholesaler, the route and what the application needs.

Routes verified against each operator's published process, August 2026

Links appear only where a wholesaler's page was fetched and read. Scottish Water, Dwr Cymru Welsh Water and Wessex Water return 403 to anything that is not a browser, and Affinity Water serves its pages as a single-page application, so routes there are named but marked unverified until a person has opened them.

Free interactive application finder

Five short steps. Your answers stay in this browser tab; nothing is sent until you ask us to prepare the application.

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Step 1 of 5: Site

Where is the site?

The postcode of the site itself, not your head office. It decides which network operator you apply to.

UK business premises only. We never look up or cold-call domestic customers.

Wholesaler or retailer, section 45 or self-lay, and why there is no statutory clock

A new water connection in England and Wales is an application to the wholesaler, the company appointed to supply the area, under section 45 of the Water Industry Act 1991. In Scotland the application goes to Scottish Water, with a Licensed Provider billing the site once it is live. There is no national form: each wholesaler publishes its own developer services portal or application pack, and the route differs between a single service connection, a new main and a large commercial supply. The tool above names the wholesaler from your postcode, or from the SPID where the site already has one, and the route for your job.

The second party is the retailer. Since the business water market opened, every non-household supply point in England carries a SPID and a retailer, and the wholesaler will not take a job on an existing supply point directly: a disconnection, a temporary disconnection, a meter removal or a meter relocation on a site that already has a SPID starts with the retailer, who raises it with the wholesaler. New connections, upgrades for more flow, moving the service pipe, diverting a main and water for building purposes stay with the wholesaler. The business water supplier lookup names the retailer and the wholesaler from the same postcode.

Two things a postcode cannot tell you. First, whether the site is on a new appointment: on many developments a new appointee (NAV), not the incumbent, is the undertaker, and two addresses in one postcode district can have different ones, so on a bare development the tool asks before trusting the postcode and on an existing site it reads the bill. Second, whether self-lay is open to you: the contestable work on a new main and services can be laid by an accredited self-lay provider and adopted by the wholesaler under section 51A, which is a different route from a section 45 connection and is priced against it. The business water questions cover the market terms in more depth.

There is no statutory quotation period for a water connection: neither the Water Industry Act nor the standards of performance regulations that govern electricity and gas set one. What applies is the wholesaler's own published levels of service, which the routing table beneath the tool shows under each wholesaler where they were read. The application itself asks for a site plan with the proposed supply position, the flow or demand and the pipe size, and the programme. Electricity and gas have their own pages: the electricity connection application and the gas connection application. Once the supply point is live, the retail contract on the new SPID is a separate decision: our guide to switching business water supplier sets out the steps, or request a business water quote and we tender it.

Quotation timescales for water

Water has no statutory quotation period. What applies is the wholesaler's own published levels of service.

There is no statutory quotation period for water connections in the instruments we cite. The wholesaler's own developer-services levels of service apply. Published levels were read for 14 of the 18 wholesalers listed in the routing table below and appear under each; where none were read, the result card says so and we confirm them with the wholesaler.

Water application routes by wholesaler

Every appointed wholesaler with its supply area, then the new-appointment and self-lay routes, with the routes, contacts and published levels of service each carries. 20 operators in the registry. Routes verified against each operator's published process, August 2026.

Registry verified 2026-08-30. Links appear only where the page was fetched and read; everything else is named but marked unverified until a person opens it.

Water wholesalers

Anglian Water

  • East of England (Cambridgeshire, Lincolnshire, Norfolk, Northamptonshire and parts of Essex and Suffolk), water and sewerage; Hartlepool Water is an Anglian brand with a separate tariff area (Anglian Water Services Limited)

Connections page: Anglian Water

Job typesRouteHowGoes to
New connection, Capacity upgradeDevelopment Services Customer Portal: new water connection (s.45)LoginOnline portalwholesaler
Temporary builder's supplyTemporary Building Supply (TBS) via the Customer PortalLoginOnline portalwholesaler
Divert network assets on the landDiverting a public sewer; water main diversion via the Customer PortalLoginPortal or formwholesaler
Water connection: survey, cost estimate and work timeline after a paid application:
within 28 days (published)
Local authority road permit where required:
minimum three months to apply for (published)
Re-estimate or re-survey on request:
within 28 calendar days (published)
  • Development Services (option 1 water connections, option 2 drainage, option 5 portal help): 03456 066 087, Mon to Fri 8am to 5pm
  • Water connections: connections@anglianwater.co.uk
  • Sewer connections and diversions: drainage@anglianwater.co.uk
  • Non-household disconnections are requested from the retailer, not Anglian (the disconnection FAQ says so); the household route is an email to a disconnections mailbox.
  • The portal is mid-migration from InFlow to the new Development Services portal; which login applies depends on application type.
  • Anglian's robots.txt disallows /SysSiteAssets/ and the self-lay notification forms, so the charging arrangements and paper forms under those paths were not read.
  • No capacity reduction or meter relocation route is published.
  • On an existing non-household supply (a SPID) disconnection, temporary disconnection, meter removal and meter relocation start with the water retailer, not the wholesaler; wholesaler disconnection routes are for developer and demolition sites.
  • A postcode lookup returns the incumbent and is silently wrong on a NAV site; confirm the undertaker from the bill or adoption paperwork.

Last verified 2026-08-30.

Northumbrian Water

  • North East England (water and sewerage), trading as Northumbrian Water (Northumbrian Water Limited, trading as Northumbrian Water in the North East and Essex & Suffolk Water in the South East)
  • Essex and Suffolk (water supply only; sewerage is another undertaker, typically Anglian Water or Thames Water), trading as Essex & Suffolk Water (Northumbrian Water Limited, trading as Northumbrian Water in the North East and Essex & Suffolk Water in the South East)

Connections page: Northumbrian Water

Job typesRouteHowGoes to
New connection, Capacity upgrade, Temporary builder's supplyDeveloper Services portal (Salesforce): water connection applicationLoginOnline portalwholesaler
Divert network assets on the land2026 Mains Diversion Application Form (NW)PDF formwholesaler
Water connection quote after the application is accepted:
aim to provide within 28 days (published)
Water connection after the quote is paid and private pipework passes inspection:
within 21 days; up to 12 weeks where traffic management is required (published)
Online contact form response:
two working days (published)
  • Water connections: 0345 609 4639, Mon to Fri 9am to 4pm
  • Sewer connections: 0333 321 4952
  • Water connections: newdevelopmentwater@nwl.co.uk
  • Sewer connections: newdevelopmentsewerage@nwl.co.uk
  • Essex & Suffolk Water pages (eswater.co.uk) were not separately read; the charging document covers both trading areas.
  • A standalone disconnection is included in a new connection application or requested by phone; the FAQ number could not be confirmed and is not published.
  • The diversion team mobile number on the diversion page is volatile and not published here.
  • On an existing non-household supply (a SPID) disconnection, temporary disconnection, meter removal and meter relocation start with the water retailer, not the wholesaler; wholesaler disconnection routes are for developer and demolition sites.
  • A postcode lookup returns the incumbent and is silently wrong on a NAV site; confirm the undertaker from the bill or adoption paperwork.

Last verified 2026-08-30.

Severn Trent Water

  • The Midlands from the Bristol Channel to the Humber and the Welsh border to the East Midlands (water and sewerage); sewerage only inside the South Staffs Water supply area (Severn Trent Water Limited)

Connections page: Severn Trent Water

Job typesRouteHowGoes to
New connection, Capacity upgradeApplication forms and guidance: new water connection (25mm to 32mm, 50mm or more), split from a shared supplyPortal or formwholesaler
Divert network assets on the landMove our water assets (diversion); move our waste assets (diversion)Portal or formwholesaler
  • Developer services: 0800 707 6600, Mon to Thu 9am to 4pm, Fri 9am to 3.30pm
  • The developer contact page is disallowed in robots.txt and was not fetched; contacts come from the charging PDF and the contact-list PDF.
  • Disconnection: the disconnecting-and-reconnecting page describes permanent and temporary disconnection via online forms whose links are client-rendered; for a business start with the retailer.
  • No published quotation or connection timescales were found; a 'quotes valid six months' snippet was not verified.
  • st-connect.co.uk is Severn Trent Connect (a wastewater and NAV business), not the application portal. The sitemap's /building-and-developing/overview/ tree is entirely 404.
  • On an existing non-household supply (a SPID) disconnection, temporary disconnection, meter removal and meter relocation start with the water retailer, not the wholesaler; wholesaler disconnection routes are for developer and demolition sites.
  • A postcode lookup returns the incumbent and is silently wrong on a NAV site; confirm the undertaker from the bill or adoption paperwork.

Last verified 2026-08-30.

South West Water

  • Cornwall, Devon and parts of Somerset and Dorset (water and sewerage) (South West Water Limited (includes the Bournemouth Water area of supply and the Isles of Scilly))
  • Bournemouth Water area (water only, own developer site at bournemouthwater.co.uk, not fetched) (South West Water Limited (includes the Bournemouth Water area of supply and the Isles of Scilly))
  • Isles of Scilly (water and sewerage since 2020) (South West Water Limited (includes the Bournemouth Water area of supply and the Isles of Scilly))

Connections page: South West Water

Job typesRouteHowGoes to
New connection, Capacity upgradeGetting a new water connection (in-page online form)Online portalwholesaler
Temporary builder's supplyStandpipe hire (temporary supply from hydrants)Online portalwholesaler
Divert network assets on the landWater main diversionOnline portalwholesaler
  • Developer Services help desk: 0800 083 1821, Mon to Thu 8.30am to 4.30pm, Fri 8.30am to 4pm
  • No developer services email is published; only a NAV mailbox exists. Contact is by phone and post.
  • No disconnection, capacity reduction or meter removal route is published on the verified pages.
  • Bournemouth Water and Bristol Water are brands of South West Water Limited with their own developer sites (not fetched); a BH or BS postcode needs those routes for water supply.
  • On an existing non-household supply (a SPID) disconnection, temporary disconnection, meter removal and meter relocation start with the water retailer, not the wholesaler; wholesaler disconnection routes are for developer and demolition sites.
  • A postcode lookup returns the incumbent and is silently wrong on a NAV site; confirm the undertaker from the bill or adoption paperwork.

Last verified 2026-08-30.

Southern Water

  • South East England: sewerage across Kent, Sussex, Hampshire and the Isle of Wight; water supply only in its own smaller districts (only Kent and West Sussex were evidenced in the charging scheme) (Southern Water Services Limited)

Connections page: Southern Water

Job typesRouteHowGoes to
New connection, Capacity upgrade, Temporary builder's supplyGetConnected portal: s.45 new water connectionLoginOnline portalwholesaler
Divert network assets on the landWater main diversion (s.185)LoginOnline portalwholesaler
s.45 water connection application review:
within five days (published)
Site survey and price for the water connection:
within 28 days (published)
Water regulations consent:
within 10 days (published)
Traffic permit where required (third party):
up to 3 months (published)
  • Developer Services (option 5): 0330 303 0119, Mon to Thu 9am to 5pm, Fri 9am to 4pm
  • Developer services: developerservices@southernwater.co.uk
  • Water connection technical queries: s45techqueries@southernwater.co.uk
  • Wastewater connections: sewerconnections@southernwater.co.uk
  • This is the clearest verified capacity-upgrade route among the water companies: the same s.45 application covers upgrading or replacing an existing supply to increase flow.
  • No standalone disconnection route was verified; a disconnection can be quoted as part of a connection job. Infrastructure charges were read from a laid-out table and should be checked against it.
  • The water-supply districts are far smaller than the sewerage area; the postcode map is sewerage-led and needs district-level water and sewerage columns.
  • On an existing non-household supply (a SPID) disconnection, temporary disconnection, meter removal and meter relocation start with the water retailer, not the wholesaler; wholesaler disconnection routes are for developer and demolition sites.
  • A postcode lookup returns the incumbent and is silently wrong on a NAV site; confirm the undertaker from the bill or adoption paperwork.

Last verified 2026-08-30.

Thames Water

  • London and the Thames Valley (water and sewerage) (Thames Water Utilities Limited (from general knowledge; not confirmed on a fetched page))

Connections page: Thames Water

Job typesRouteHowGoes to
New connectionApply for a new water connection (online journey)Online portalwholesaler
New connection, Capacity upgradeNew mains and water connections application (fillable, 21 pages)PDF form, fillablewholesaler
Temporary builder's supplyApplication to use an existing water supply for building purposes (fillable)Portal or form, fillablewholesaler
Divert network assets on the landApply for a water main diversion (fillable)PDF form, fillablewholesaler
New water service connection: connection date after quote acceptance:
typically up to three months for permissions; the work itself up to four days (published)
New water main construction:
within 90 days of accepting the quote (published)
Acknowledgement of an emailed application (DS reference and amount payable):
within 2 days (published)
Permanent disconnection (developer route):
call within 7 days; mark-up visit within 14 days; disconnection within 21 days after mark-up, often longer for road permits (published)
  • Developer Services: 0800 009 3921, Mon to Fri 8am to 5pm, closed bank holidays
  • Developer Services: developer.services@thameswater.co.uk
  • The legacy host developers.thameswater.co.uk does not resolve; search engines still surface forms there. Never link it.
  • A fillable disconnection form exists (application-for-a-disconnection.pdf, free, registered owner must authorise) but non-household customers are told to contact their retailer, so it is not carried as a route.
  • Meter moves: the household route is a phone survey; non-household meter changes go through the retailer. No capacity reduction or meter removal route is published.
  • Postal address Clearwater Court, Vastern Road, Reading RG1 8DB; an online enquiry form exists at https://www.thameswater.co.uk/developers/contact/enquiry.
  • On an existing non-household supply (a SPID) disconnection, temporary disconnection, meter removal and meter relocation start with the water retailer, not the wholesaler; wholesaler disconnection routes are for developer and demolition sites.
  • A postcode lookup returns the incumbent and is silently wrong on a NAV site; confirm the undertaker from the bill or adoption paperwork.

Last verified 2026-08-30.

United Utilities

  • North West England (Cumbria, Lancashire, Greater Manchester, Merseyside, Cheshire), water and sewerage (United Utilities Water Limited (contact page names United Utilities Group PLC, Haweswater House, Lingley Mere Business Park, Warrington WA5 3LP))

Connections page: United Utilities

Job typesRouteHowGoes to
New connection, Capacity upgrade, Temporary builder's supplyApply for a new water connection (AWS1 online web form for houses; AWS2 flats and AWS3 commercial PDFs)Portal or form, fillablewholesaler
Divert network assets on the landWater main diversion application (March 2026)PDF formwholesaler
New water connection quote:
within 28 calendar days (published)
New water connection completion after payment and inspection:
within 21 calendar days, subject to traffic management (published)
Temporary (building) supply validity:
12 months, reviewed annually (published)
Water main diversion (large developments):
up to 6 months from initial enquiry (published)
  • Developer Services (option 2 wastewater): 0345 072 6067, Mon to Fri 8am to 6pm
  • Large developers, self-lay providers, NAVs and diversions: 0345 026 8989, Mon to Fri 8am to 5pm
  • Water: developerserviceswater@uuplc.co.uk
  • Wastewater: wastewaterdeveloperservices@uuplc.co.uk
  • Commercial disconnection is 'managed by the retailer and carried out by our network teams' (verbatim), so it is not a wholesaler route; household demolition has phone lines.
  • The household meter relocation form (126.23 pounds) is a metering route, not a developer or B2B route, and is not carried.
  • The published levels of service (SAM and SLPM codes) cover sewer adoption and self-lay, not standard connections, and are not reproduced.
  • A free water connection budget calculator exists at https://www.unitedutilities.com/builders-developers/water-services/water-connections/water-connection-calculator/
  • On an existing non-household supply (a SPID) disconnection, temporary disconnection, meter removal and meter relocation start with the water retailer, not the wholesaler; wholesaler disconnection routes are for developer and demolition sites.
  • A postcode lookup returns the incumbent and is silently wrong on a NAV site; confirm the undertaker from the bill or adoption paperwork.

Last verified 2026-08-30.

Wessex Water

  • Dorset, Somerset, most of Wiltshire and parts of Gloucestershire and Hampshire (water and sewerage); sewerage only in Bristol and Bath, where Bristol Water supplies water (Wessex Water Services Limited (developer materials brand as YTL Wessex Water))

Connections page: Wessex Water

Job typesRouteHowGoes to
New connectionApply for a water connection online (developer portal)LoginOnline portalwholesaler
New connectionSite connections (multi-property developments, water and sewer)LoginOnline portalwholesaler
Temporary builder's supplyPortable standpipe hire (via Aquam) or building water through the supply connection (opens operator site, unverified)Portal or formwholesaler
Divert network assets on the landWater main diversion (via the developer portal dashboard)LoginOnline portalwholesaler
New water supply connection:
acknowledged within 5 calendar days; site visit and quotation within 28 days; quote valid at least one month or to the end of the financial year; price valid 3 months after payment (published)
New water main (requisition):
acknowledged within 5 working days; fixed quote within 28 calendar days (42 for sites over 500 properties) (published)
  • New water supply connections: 01225 526222, Mon to Thu 8am to 4.30pm, Fri 8am to 4pm
  • New sewerage connections, build-over and mapping: 01225 526333
  • Water connections and disconnections: water.connection@wessexwater.co.uk
  • Sewer connections: sewer.connection@wessexwater.co.uk
  • The content host developerservices.wessexwater.co.uk refuses the WebFetch client with 403 and was read with a plain desktop browser user agent; the first research pass saw 403 on every path. Re-confirm in a browser before relying on it.
  • A fillable disconnection form (WWDS-DEV-003A) exists for domestic disconnections; non-domestic customers are told to contact their retailer, so it is not carried as a route.
  • No capacity upgrade, capacity reduction or meter relocation route is published on the developer site.
  • The developers.wessexwater.co.uk portal ids are not symmetrical: /OtherSewerConnection/Index/1000 exists, /OtherWaterConnection/Index/1000 is 404.
  • On an existing non-household supply (a SPID) disconnection, temporary disconnection, meter removal and meter relocation start with the water retailer, not the wholesaler; wholesaler disconnection routes are for developer and demolition sites.
  • A postcode lookup returns the incumbent and is silently wrong on a NAV site; confirm the undertaker from the bill or adoption paperwork.

Last verified 2026-08-30.

Yorkshire Water

  • Yorkshire (water and sewerage); the 'parts of North Lincolnshire and Derbyshire' wording is unsourced (Yorkshire Water Services Ltd)

Connections page: Yorkshire Water

Job typesRouteHowGoes to
New connection, Temporary builder's supplyConnectMe (free budget estimate or full application)LoginOnline portalwholesaler
New water connection:
receipt confirmed within 5 days; quote within 28 days of a completed application; connection within 21 days of the checklist; up to three months where council notice is needed (published)
Quote validity:
6 months from issue (published)
Permanent water disconnection (developer route):
initial response within 5 days; surveyor visit within 28 days; disconnection normally within 28 days (published)
  • Developer Services (option 2 clean water, option 1 sewerage): 0345 120 84 82, Mon to Fri 8am to 5pm
  • Clean water: wbu.service.centre@yorkshirewater.co.uk
  • Sewerage: technical.sewerage@yorkshirewater.co.uk
  • No capacity upgrade, capacity reduction or meter relocation route is published; no water main diversion form was located beyond the charge line.
  • The free developer disconnection route via ConnectMe is for demolition sites; a business starts with its retailer.
  • Legacy /media7/ PDFs still resolve but are not linked from the current site.
  • On an existing non-household supply (a SPID) disconnection, temporary disconnection, meter removal and meter relocation start with the water retailer, not the wholesaler; wholesaler disconnection routes are for developer and demolition sites.
  • A postcode lookup returns the incumbent and is silently wrong on a NAV site; confirm the undertaker from the bill or adoption paperwork.

Last verified 2026-08-30.

Hafren Dyfrdwy

  • Wrexham area of north east Wales (former Dee Valley Water) (Hafren Dyfrdwy Cyfyngedig (Severn Trent group))
  • Powys and mid Wales (former Severn Trent Wales); in much of its area sewerage is provided by Dwr Cymru Welsh Water, boundary unverified (Hafren Dyfrdwy Cyfyngedig (Severn Trent group))

Connections page: Hafren Dyfrdwy

Job typesRouteHowGoes to
New connection, Temporary builder's supplyWater connections application form, Wrexham area (fillable, 10 pages)PDF form, fillablewholesaler
Divert network assets on the landDiversion of a water main application (fillable, 7 pages)PDF form, fillablewholesaler
  • Developer Services: 0330 678 1481, Mon to Thu 9am to 4pm, Fri 9am to 3.30pm
  • Most building-and-developing pages in the site's own sitemap return 404 (overview, water and sewer connection, temporary supply, diversions, commercial property, charges); only the forms page and the get-in-touch forms are live.
  • Two-area split: separate Wrexham and Powys forms; a Powys-only large diameter connections form exists but is an analogy for a bigger supply, not a published capacity upgrade route.
  • Business premises disconnections go through a retailer (stated on the permanent disconnection page); the online disconnection forms are household or developer routes.
  • /developers/ redirects to an unresolvable internal host; do not use it as a landing URL.
  • On an existing non-household supply (a SPID) disconnection, temporary disconnection, meter removal and meter relocation start with the water retailer, not the wholesaler; wholesaler disconnection routes are for developer and demolition sites.
  • A postcode lookup returns the incumbent and is silently wrong on a NAV site; confirm the undertaker from the bill or adoption paperwork.

Last verified 2026-08-30.

Dwr Cymru Welsh Water

  • Most of Wales plus Herefordshire and parts of Cheshire and Gloucestershire (water and sewerage) (Dwr Cymru Cyfyngedig (Glas Cymru group))

Connections page: Dwr Cymru Welsh Water

Job typesRouteHowGoes to
New connection, Capacity upgrade, Temporary builder's supplyNew water connections, standard size (portal application; information page)LoginOnline portalwholesaler
New connectionLarge diameter or fire sprinkler connection over 63mm application (PDF, 8 pages)Emailwholesaler
Divert network assets on the landAlteration or removal (including diversion) of a water mainLoginOnline portalwholesaler
Standard new water connection:
application reviewed within 5 calendar days; quote within 28 days of a full application; trench inspection within 5 working days; connection within 21 days after inspection (published)
  • Developer Services: 0800 917 2652, Mon to Fri 8.30am to 5pm
  • Developer Services (printed on the large-diameter connection page): developer.services@dwrcymru.com
  • developers.dwrcymru.com refuses the WebFetch client with 403 and was read with a plain desktop browser user agent; the first research pass saw 403 on every host. Re-confirm in a browser before relying on it.
  • No disconnection, capacity reduction or meter relocation route exists anywhere in the developer sitemap; the retailer relationship is not stated on the developer pages.
  • The payment portal link on the charges page (developerservices.dwrcymru.com) returns 404; pay at https://developers.dwrcymru.com/en/my-account/pay-your-quotation.
  • On an existing non-household supply (a SPID) disconnection, temporary disconnection, meter removal and meter relocation start with the water retailer, not the wholesaler; wholesaler disconnection routes are for developer and demolition sites.
  • A postcode lookup returns the incumbent and is silently wrong on a NAV site; confirm the undertaker from the bill or adoption paperwork.

Last verified 2026-08-30.

Affinity Water

  • North and West London and the surrounding Home Counties, in Central, East and Southeast regions; water supply only (sewerage by Thames Water or Anglian Water in the Central region, Anglian Water in the East and Southern Water in the Southeast) (Affinity Water Limited (company no. 02546950))

Connections page: Affinity Water

Job typesRouteHowGoes to
New connection, Capacity upgradeMy Developments portal (Development Experience)LoginOnline portalwholesaler
Temporary builder's supplyApply for a temporary supply (My Developments portal); hydrant licence alternativeLoginOnline portalwholesaler
Divert network assets on the landWater mains diversion application (s.185, My Developments portal)LoginOnline portalwholesaler
New water main application: cost advice:
within 28 calendar days of receiving the application (published)
  • Development Experience: 0345 357 2428, Mon to Thu 8.30am to 5pm, Fri 8.30am to 4.30pm
  • Development Experience (also the charging arrangements enquiry address): dx@affinitywater.co.uk
  • affinitywater.co.uk is a single-page app that returns 200 for every path including invented ones, so an HTTP status is no evidence a page exists; the pages above were read in a rendered browser. Link checkers must not trust a 200 from this host.
  • A disconnection application exists in the portal (free), but on an existing SPID the retailer comes first.
  • No capacity reduction, meter removal or meter relocation route was found.
  • The '5 steps to connection' PDF URL returns the HTML app shell, not a PDF.
  • On an existing non-household supply (a SPID) disconnection, temporary disconnection, meter removal and meter relocation start with the water retailer, not the wholesaler; wholesaler disconnection routes are for developer and demolition sites.
  • A postcode lookup returns the incumbent and is silently wrong on a NAV site; confirm the undertaker from the bill or adoption paperwork.

Last verified 2026-08-30.

Portsmouth Water

  • South Hampshire and parts of West Sussex; water supply only (sewerage normally Southern Water); does not cover the Isle of Wight (Portsmouth Water Ltd)

Connections page: Portsmouth Water

Job typesRouteHowGoes to
New connection, Temporary builder's supplyApplication for New Water Supply (service connection form or developer portal)Portal or form, fillablewholesaler
Divert network assets on the landMains diversion application formEmailwholesaler
Service connection: survey and quote:
within 28 days of receipt of the application fee (published)
Mains requisition: acknowledgement and design:
acknowledgement within 5 days; design and terms within 28 days of a complete application (published)
Developer portal account approval:
within 5 working days (published)
  • Developer Service team (service connections): 023 9244 9088, Mon to Fri 8.30am to 4.30pm
  • New Development team: 02392 249 327
  • Developer services: developer.services@portsmouthwater.co.uk
  • No disconnection, meter removal, meter relocation, capacity upgrade or capacity reduction route is published; the pre-development enquiry and the standard application are the nearest routes.
  • The widely indexed www.portsmouthwater.co.uk/developers/new-services/ redirects to a double-slash URL and the single-slash form is 404; use the developers subdomain and its /developments/* children.
  • The rates.ts wholesaler table wrongly gives Portsmouth Water the Isle of Wight; Southern Water supplies it.
  • On an existing non-household supply (a SPID) disconnection, temporary disconnection, meter removal and meter relocation start with the water retailer, not the wholesaler; wholesaler disconnection routes are for developer and demolition sites.
  • A postcode lookup returns the incumbent and is silently wrong on a NAV site; confirm the undertaker from the bill or adoption paperwork.

Last verified 2026-08-30.

South East Water

  • Kent, Sussex, Surrey, Hampshire and Berkshire; water supply only (wastewater by Thames Water, Southern Water, Severn Trent Connect or Icosa Water depending on location) (South East Water Limited, Developer Services, Rocfort Road, Snodland ME6 5AH)

Connections page: South East Water

Job typesRouteHowGoes to
New connection, Capacity upgradeNew service connection application (application form portal)Online portalwholesaler
Temporary builder's supplyTemporary supply application formOnline portalwholesaler
Divert network assets on the landC3 diversion (C4 diversion at /water-connections/c4-diversion/)Online portalwholesaler
New service connection quote:
within 28 days of submitting and paying for the application (published)
New service connection works:
within 21 days in most circumstances; up to 12 weeks if traffic sensitive (published)
  • Developer Services: 0333 000 0060, Mon to Fri 8am to 4pm
  • Developer Services: developer.services@southeastwater.co.uk
  • No disconnection, meter removal, meter relocation or capacity reduction route exists on the portal or in its sitemap.
  • Developer content lives on the www.developers subdomain; the main-site /developer-services/ and the indexed /developer-portal/ paths are 404. The Australian southeastwater.com.au is a different company.
  • Its NAV page is a good primary source on NAV mechanics, but its SLAs are South East Water's, not a NAV route's.
  • On an existing non-household supply (a SPID) disconnection, temporary disconnection, meter removal and meter relocation start with the water retailer, not the wholesaler; wholesaler disconnection routes are for developer and demolition sites.
  • A postcode lookup returns the incumbent and is silently wrong on a NAV site; confirm the undertaker from the bill or adoption paperwork.

Last verified 2026-08-30.

South Staffs Water

  • Staffordshire and parts of the West Midlands from Ashbourne to Halesowen and Burton-upon-Trent to Kinver; water supply only (sewerage by Severn Trent Water) (South Staffordshire Water PLC (South Staffs region; the same licence also covers the Cambridge region))

Connections page: South Staffs Water

Job typesRouteHowGoes to
New connection, Capacity upgrade, Temporary builder's supplyStandard 25mm connection form and non-standard 32mm or larger form (both fillable)PDF form, fillablewholesaler
Divert network assets on the landDiversion form (/media/kk1bxoly/diversion-form.pdf, fillable)PDF form, fillablewholesaler
New connection: receipt, quote, inspection, connection:
5 days; 28 days; 5 days; 21 days (about 3 months if a road closure is needed) (published)
Mains diversion: quote and works:
42 days; 90 days (published)
  • Developer Services: 0345 345 1399
  • Applications, agreements and payments: developerservices@south-staffs-water.co.uk
  • Service requests: Servicerequests@south-staffs-water.co.uk
  • Cambridge Water is the same company and licence but has its own developer contacts and form URLs; route a Cambridge-region site to the cambridge-water record.
  • No disconnection, meter removal or capacity reduction route is published.
  • A separation or replacement connection form exists for splitting a shared supply or replacing a connection up to 25mm.
  • On an existing non-household supply (a SPID) disconnection, temporary disconnection, meter removal and meter relocation start with the water retailer, not the wholesaler; wholesaler disconnection routes are for developer and demolition sites.
  • A postcode lookup returns the incumbent and is silently wrong on a NAV site; confirm the undertaker from the bill or adoption paperwork.

Last verified 2026-08-30.

Cambridge Water

  • Cambridge and the surrounding area from Ramsey in the north to Melbourn in the south and Gamlingay in the west; water supply only (sewerage by Anglian Water) (South Staffordshire Water PLC trading as Cambridge Water, 90 Fulbourn Road, Cambridge CB1 9JN)

Connections page: Cambridge Water

Job typesRouteHowGoes to
New connection, Capacity upgrade, Temporary builder's supplyStandard 25mm connection form and non-standard 32mm or larger form (both fillable)PDF form, fillablewholesaler
Divert network assets on the landDiversion form (/media/yljj5if4/diversion-form.pdf)PDF formwholesaler
New connection: receipt, quote, inspection, connection:
5 days; 28 days; 5 days; 21 days (typically three months if a road closure is needed) (published)
  • Developer Services: 01223 403115
  • Developer Services (Cambridge region): CamNetDev@south-staffs-water.co.uk
  • Cambridge Water is the Cambridge region of South Staffordshire Water PLC, not a separate appointed undertaker; it is kept as a record because contacts and form URLs differ.
  • No disconnection, meter removal or capacity reduction route is published.
  • On an existing non-household supply (a SPID) disconnection, temporary disconnection, meter removal and meter relocation start with the water retailer, not the wholesaler; wholesaler disconnection routes are for developer and demolition sites.
  • A postcode lookup returns the incumbent and is silently wrong on a NAV site; confirm the undertaker from the bill or adoption paperwork.

Last verified 2026-08-30.

SES Water

  • Parts of Surrey, Kent and south London; water supply only (sewerage by Thames Water or Southern Water depending on location) (SES Water, London Road, Redhill RH1 1LJ)

Connections page: SES Water

Job typesRouteHowGoes to
New connectionNew connections application (online page) or DS New Connection Application Form (.docx)Portal or formwholesaler
Capacity upgradeApplication to upgrade existing supplyOnline portalwholesaler
Temporary builder's supplyStandpipe hire (temporary water from hydrants)Phonewholesaler
New connection estimate:
within 28 calendar days of confirming a complete application (published)
  • Developer Services: 01737 772000, Mon to Fri 9am to 3pm
  • Developer Services: developerservices@seswater.co.uk
  • No disconnection, meter removal, meter relocation, mains diversion or capacity reduction route was found in the developers section or the sitemap.
  • Use the www host and the /developers/services/ prefix; the apex host and the indexed shorter paths are 404.
  • On an existing non-household supply (a SPID) disconnection, temporary disconnection, meter removal and meter relocation start with the water retailer, not the wholesaler; wholesaler disconnection routes are for developer and demolition sites.
  • A postcode lookup returns the incumbent and is silently wrong on a NAV site; confirm the undertaker from the bill or adoption paperwork.

Last verified 2026-08-30.

Scottish Water

  • Scotland: water and sewerage for all Scottish postcodes; a single national provider, so no second sewerage undertaker and no NAV regime (Scottish Water, a body corporate established by section 20 of the Water Industry (Scotland) Act 2002)

Connections page: Scottish Water (opens operator site, unverified)

Job typesRouteHowGoes to
New connectionDevelopment Services application (unverified) (opens operator site, unverified)Portal or formwholesaler
  • Nothing was verified: every URL is search-index derived and must be opened in a browser before it is shown as live. No phone or email is published here.
  • Non-household customers in Scotland are billed by a Licensed Provider (retailer) under the WICS-regulated retail market; connections are still applied for at Scottish Water, and the Licensed Provider route for disconnections is a hint from a URL path only.
  • The guessed host developerportal.scottishwater.co.uk does not resolve; do not use it.
  • On an existing non-household supply (a SPID) disconnection, temporary disconnection, meter removal and meter relocation start with the water retailer, not the wholesaler; wholesaler disconnection routes are for developer and demolition sites.
  • A postcode lookup returns the incumbent and is silently wrong on a NAV site; confirm the undertaker from the bill or adoption paperwork.

Last verified 2026-08-30.

Other water routes

Not wholesalers. A development can be served by a new appointment (NAV) instead of the incumbent, which a postcode cannot detect, and the contestable works on a new connection can be self-laid by an accredited provider.

New Appointments and Variations (NAV) route

  • England and Wales, site by site: a NAV holds the appointment for a defined development area (unserved site, incumbent consent, or a premises using at least 50 megalitres a year in England or 250 in Wales, WIA 1991 s.7); no NAV regime exists in Scotland (Ofwat-appointed site-specific water and/or sewerage undertakers (limited companies appointed per site))

Connections page: New Appointments and Variations (NAV) route

Job typesRouteHowGoes to
New connectionIncumbent-side NAV route (South East Water example): NAV enquiry, site status letter, bulk supply offerOnline portalwholesaler
New connectionNAV-side example: Albion WaterPortal or formwholesaler
  • A postcode lookup returns the incumbent and is silently wrong on a NAV site: two addresses in one postcode district can have different undertakers. Ask the customer whether the site is a new development on an independent network and check the bill or adoption paperwork.
  • Ofwat's register of NAVs granted to date is the only authoritative list and could not be retrieved (403). CCW lists eleven NAVs (Advanced Water Infrastructure Networks / Leaf Water, Albion Water, County Water, ESP Utilities Group, Independent Water Networks, Last Mile Water, LEEP Utilities, Matrix Water, MUA Water, Severn Trent Services, Veolia Water Tidworth) but that is not the register; the Independent Networks Association member list is not a NAV list either.
  • The South East Water SLAs on its NAV page (5, 21, 28 and 90 days) are the incumbent's commitments, not a NAV route timescale.

Last verified 2026-08-30.

Self-lay under WIA 1991 s.51A (WIRS-accredited providers)

  • England and Wales (every incumbent accepts self-lay for contestable work; the final connection to the live main stays non-contestable); the register also covers Scotland and Northern Ireland (Accredited Self-Lay Providers on the Water Industry Registration Scheme register operated by LRQA)

Connections page: Self-lay under WIA 1991 s.51A (WIRS-accredited providers)

Job typesRouteHowGoes to
New connectionWIRS / WIRSAE accredited provider searchOnline portalwholesaler
  • LRQA UK: +44 121 817 4300
  • Self-lay is an alternative delivery route for contestable new mains and services, not an application route for disconnection, meter removal or capacity reduction.
  • WIRS is operated by LRQA at lrqa.com; every lr.org WIRS path is 404 and operator pages that still say 'Lloyd's Register' are stale.
  • WIRS and WIRSAE are different accreditations: WIRSAE providers are contracted by retailers for temporary or permanent disconnections and meter installation. Accreditation scope is per organisation, so check the scope, not just the listing.
  • The Water UK Codes for Adoption live on water.org.uk, which serves a Cloudflare challenge to automated clients; the South Staffs codes page is a reachable description.

Last verified 2026-08-30.

Frequently asked questions

Who receives a water connection application?
The wholesaler for the postcode, under section 45 of the Water Industry Act 1991, for a new connection, an upgrade for more flow, a move of the service pipe, a diversion of a main or water for building purposes. In Scotland that is Scottish Water. Where the site already has a SPID, jobs on that supply point (a disconnection, a temporary disconnection, a meter removal or a meter relocation) start with the retailer, who raises them with the wholesaler. The tool reads the retailer registered at the site so those requests go to the right party first time.
Section 45 connection or self-lay: which route?
A section 45 application asks the wholesaler to make the connection itself, and on a single service connection it is usually the only route. On a development that needs a new main and several services, the contestable work can instead be designed and laid by a self-lay provider accredited under WIRS and adopted by the wholesaler under section 51A, against a point of connection, a design approval and an adoption agreement from the wholesaler. Self-lay is a delivery route for new mains and services, not an application route for a disconnection, a meter removal or a capacity change. The routing table beneath the tool carries both.
Why does a postcode lookup fail on a NAV site?
Because a postcode lookup returns the incumbent wholesaler, and on a site served by a new appointee (NAV) the incumbent is not the undertaker. NAVs hold appointments for individual developments, so two addresses in one postcode district can have different wholesalers, and nothing in the postcode says which. Where the site already has a SPID the tool reads the wholesaler behind it; on a bare development it asks whether the site is on an independent network before trusting the postcode, and the adoption paperwork or the bill confirms the undertaker.
Is there a statutory quotation period for a water connection?
No. The Electricity (Standards of Performance) Regulations 2015 and the Gas (Standards of Performance) Regulations 2005 set quotation periods for those two utilities; nothing equivalent applies to a water connection under the Water Industry Act 1991. What applies is the wholesaler's own published levels of service for developer services, which vary by wholesaler and by job. Where a wholesaler publishes them and the page could be read, they appear under that wholesaler in the routing table beneath the tool; where they were not read, the result card says so and a consultant confirms them with the wholesaler.
Who do I ask first for a disconnection or a meter move on an existing supply?
The retailer. On a non-household supply point with a SPID, a permanent disconnection, a temporary disconnection, a meter removal and a meter relocation all start with the retailer, which raises the job with the wholesaler through the market's central system. Applying to the wholesaler directly for one of these is refused or redirected. The wholesaler's own disconnection routes are for developer and demolition sites without a live supply point, and the tool separates the two.
What is a SPID and where do I find it?
A SPID (Supply Point Identifier) is the unique reference for each water or sewerage supply point in the English non-household market, held on the market operator's central system. It is printed on the water bill with the retailer's name, and the tool's supply-check step lists the SPIDs at a postcode where the upstream lookup is available. A site with a SPID is an existing supply for routing purposes; a site without one is treated as a bare site and the application goes to the wholesaler.
Can I get water for building purposes before the permanent supply?
Yes. Wholesalers supply water for building purposes as a temporary arrangement for the life of the works: a temporary building supply connection, an existing supply on the site used under an application for building purposes, or standpipe hire from a hydrant where the wholesaler offers it. The tool carries this as the temporary builder's supply job on water and names the wholesaler's route where one is published. It does not become the permanent supply: the permanent connection is a separate section 45 application, sized on the finished building's demand.
What does a water connection application need?
A site location plan showing the boundary and the proposed supply position, the flow or demand the site needs and the pipe size where the job asks for it, the SPID and a recent bill where a supply already exists, proof of title or landowner consent on a bare site or a diversion, a letter of authority where someone applies on the business's behalf, and the programme dates. Several wholesalers ask about pressure and supply size for commercial premises on the same form. The result card in the tool lists exactly which of these your job needs.
Can I reduce the capacity of a water supply to cut the bill?
There is no capacity charge to reduce on a water supply, so there is no capacity-reduction application to the wholesaler. A smaller meter or a changed tariff goes through your retailer, and the tool marks the job that way. If the site's demand has fallen, the saving comes from the retail contract and from checking the meter size and the charges on the bill, not from the network.
Is the application service free?
Yes. We complete the wholesaler's or the retailer's application on its own form and submit it with your authority at no fee. Where we also tender the retail water contract on the new supply point, every offer is presented with the wholesale charge, the retailer margin and our margin shown separately, so you can see exactly what the service costs.

Sources

Water connections are made under section 45 of the Water Industry Act 1991, with self-lay adoption under section 51A of the same Act; neither sets a quotation period, and the standards of performance regulations for electricity and gas do not apply to water. Application routes, forms, contacts, fee positions and levels of service from each wholesaler's own website, fetched and read where the wholesaler allows it and otherwise marked unverified. Nothing on this page is estimated by Purely Energy; where a figure or a route could not be verified, the page says so.

Wholesaler or retailer, the right one first time

Tell us the site and the demand. We complete the wholesaler's application on its own form, or raise the job with the retailer where the site has a SPID, submit it with your authority and tender the retail contract on the new supply point. No fee for the application.