Applications
Already know what you need? Here’s a handy bank of all our application forms in PDF format so you can quickly access the ones you need:
Application forms
Maps of water pipes and sewers
Drainage and water searches
New water connections - large diameter (63mm)
New water main
Diverting or abandoning a water main
Adopting existing sewerage
Requisition a public sewer and or lateral drain
New water connection
New sewer connection
Public sewer adoption
Public sewer diversion
Build over sewer self certification
Build over sewer full application
Dŵr Cymru Welsh Water
PO Box 3146
Linea
Fortran Road
Cardiff
CF30 0EH
If you’re posting the forms to us, make sure you also include your payment made payable to Dŵr Cymru Welsh Water. Incorrect postage costs could result in your application form being returned by the Post Office, so check the weight and postage costs beforehand.