Notification and testing of works

If you need a new water supply, or are changing any plumbing that relates to the water regulations, we want to be notified to ensure it complies with the regulations.

Welsh Water have a ‘Developer Services Team’, who can tell you about connecting your home or business to our drinking water supply and waste water pipes. They receive requests and plans for new connections all the time, and can discuss whether our network can deal with your new connection without any problems, or whether you may need to change your plans a little bit. The Developer Services Team have an online application form to complete at the following link.

Notifying us of changes

If you want to make the following changes to plumbing systems or fittings, please sent us a ‘notification of proposed installation form’:

  1. The extension or alteration of a water system on any premises other than a house;
  2. A material change of use of any premises; and,
  3. The installation of a number of fittings listed in the Notification Form.

The form has a link to a guidance section, but please also note that:

  • We need to have your notification form before you start or have installed any plumbing system or water fittings described in the form, and or in the text above. We will aim to send a response to you within 10 working days of us receiving your notification form.
  • If you haven’t had a response from us, and it’s been longer than 10 working days, this means we have approved the application. This still means that the plumbing work has to be completed in the right way, and pass the regulations.
  • The law allows us to take legal action if we are not notified.

Notification of Reduced Pressure Zone Valve Installation Form

If you wanted to protect your drinking water supply, from hazards that are up to a fluid category 4 (see ‘General Information and Advice’ section), you could have a reduced pressure zone valve, or RPZ, installed. RPZ valves help protect drinking water supplies from chemicals or contaminants that could cause a health hazard (e.g. pesticides or biological organisms).

WRAS have a leaflet ((an ‘approved installation method’ (or AIM)) here, which explains the installation, maintenance and testing of RPZ valves, as well training requirements for the tester.

If you want to install an RPZ valve, there is a ‘notification form’ to complete. This can be obtained by:

  • Downloading the form here, and emailing it to our address, including any relevant plans.
  • Downloading the form and posting it, including any relevant plans, to, The Water Regulations Scheduling Team, Penybont (Merthyr Mawr), Ogmore by Sea, Nr. Bridgend, CF32 0QP.

The ‘notification of RPZ installation form’ has a guidance section at its base, but please also note that:

  • All RPZ valves must be tested annually, and will be recorded on DCWW’s records.
  • More guidance can be found on WRAS’ website at the following link.
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Notification of RPZ Installation form

PDF, 73.4kB

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Notification of proposed installation

PDF, 127.9kB