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Notify us of your plumbing work

If you're planning any plumbing work in accordance with the Water Supply (Water Fittings) Regulations 1999, you must notify us in advance to ensure that the work will not impact the quality and safety of the water.

This includes, but is not limited to:

  • Construction of a building or structure
  • Proposed change of use
  • Installation of backflow protection
  • Lead replacement
  • Rerouting of an existing supply
  • Any alterations or extensions to plumbing in non-domestic premises or for animal welfare purposes

To learn more about the regulations visit

To complete this form, please attach:

  1. A plan of the premises to which the proposal relates
  2. A schematic diagram showing pipework, terminal fittings, and backflow prevention devices to be installed
  3. A list of the fittings you will be using

Fields marked with * are mandatory.

Details of person giving notice

Details of approved contractor

Please give us the details of your approved contractor, if you are using one.

Details of premises

Details of the work

You must provide the expected start date, even if this may change.

Notifiable works

The list below shows the types of water fittings that you must tell us about. Please tick all items that apply.

The installation of:

Drawings and schedule of fittings

You  must send a plan or drawings of your proposed works site with a schematic diagram showing pipework, terminal fittings and backflow prevention devices to be installed.

You can use the upload buttons below to attach the file from your computer. There is a max file size per form of 3mb, so you may need to save any photographs as low res or use file compression. 

If you are unable to send digital copies, you may send hard copies to: 
Network Regulations,
Affinity Water, Redricks Lane, Sawbridgeworth, Hertfordshire, CM21 0RL 

If you do not provide the correct documentation, your application may be delayed or rejected. 

All fittings must comply with the requirements of the Water Supply (Water Fittings) Regulations 1999 (4).

Your contact details

In case we have a query with your notification please enter a contact email address below.


Data protection: The information you provide may be used by Affinity Water to provide you with water services, give you information about your water supply and manage your account; including the collection and recovery of charges. We also collect charges on behalf of Thames Water and Anglian Water who provide sewerage services in our supply area. Read our full privacy policy.

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