New Appointment and Variation (NAV)

A new appointment is made where a limited company is appointed by Ofwat to provide water and/or sewerage services for a specific geographic area.

A variation is where an existing appointed company (an “appointee”) asks Ofwat to vary its appointment so it can extend the areas it provides services to. A new appointee has the same duties and responsibilities as the previous statutory water company.

A NAV therefore involves one company replacing another as the appointee for a specific geographic area.

In order to make your application to Ofwat for the new appointment, you’ll need some information from the Company as the incumbent water and/or sewerage company. If you’re looking to make a bulk connection with our network(s), we can also help you set up the bulk agreement(s), arrange for any site-work and set you up as our customer.

A site will be eligible for applying for a new appointment and variation if it is:

  • unserved;
  • for a large user; or
  • given consent by the incumbent water and/or sewerage company.

For more information on how to apply for a new appointment or variation please see the Ofwat's website

Please click here to contact the team

Consultation on NAV Bulk Charges 2021/22 - now closed

Consultation on NAV Bulk Charges 2021/22 - now closed

In the following consultation we asked for your views on our proposals for 2021/22 Bulk Charges for NAVs


South West Water Bulk Charges for NAVs 2021/22 - consultation on proposals


The consultation closed at 5pm on the 22 December 2020. Please see below for a summary of the comments we received and our responses.

South West Water Consultation responses 2021/22


Pre Development - Point of connection information

If you are planning to connect to our waste water and/or clean water network and you would like to understand the options which are available for the connection and an estimate of the likely cost of the connection before you make a formal application to us, we can provide you with the point of connection information and a budget estimate.

Please click here for more information.

Draft Bulk Supply and Discharge Agreements

Depending on the type of service you will provide we will need to set up bulk supply and / or discharge agreements with you.

Copies of our draft agreements can be found on the links below. These are industry standard documents which came in to effect on 1 July 2020.

Please note that we are developing special conditions which align with our New Connection and Developer Services Charging Arrangements and our Bulk Charges for NAVs. These will be available with an updated questionnaire as soon as possible. Please contact us if you have any questions in the meantime.

Clean Water
Bulk supply agreement
Special Conditions (sample)
Bulk supply questionnaire: under development

Waste Water
Bulk discharge agreement
Special Conditions
Bulk discharge questionnaire 

NAV meter reading and information supply agreement


New Connections and Developer Services Charges

Bulk Supply Charges

How can we help