Did you know all premises that have a water supply from Welsh Water are legally required to ensure their plumbing systems comply with The Water Supply (Water Fittings) Regulations 1999? Essentially, everything on a customer’s side of the boundary is required to comply.
If you don’t know what is covered by the regulations, then you can find a diagram explaining them below. While Welsh Water owns and fixes the section on the far left of the diagram, the Regulations apply to the two sections on the right: your private supply pipework and your internal pipework and fittings.
Watersafe - Local Approved Plumbers
Find your nearest, Watersafe-approved plumber, just enter your postcode or use your location.
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Notification and testing of works
If you are installing a new water connection or RPZ, we need to inspect the work to ensure it meets regulations. Download the notification form here.
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Reduced Pressure Zone (RPZ) Valves
If you have an RPZ valve installed at your premises or think you have a need to install one, there are some things you should know first.
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Regulations for private water supply
If your supply is from a private source and is connected to our supply, it needs to meet regulations. Find out how the DWI should inspect your supply.
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Water regulation advice and guidance
Information on how Welsh Water inspects installations and connections to ensure compliance with regulations.
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WaterSafe supply pipe installers
When laying water supplies for your development, we recommend using an installer that is listed by WaterSafe, the national register for approved contractors.
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WaterSafe plumbers
At Welsh Water, we encourage the use of qualified and experienced professionals when carrying out any plumbing work. That’s why we promote the use of WaterSafe members to all our customers.
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WC Compliance
If installing new toilets in England or Wales, you need to ensure any new installations contain compliant backflow protection to reduce risks to public health.
Contact Us
Speak to an advisor
If you are an Open Water Customer and you have any other questions, you can email or call the Business Customer Team and they will be happy to help.
8am to 6pm Monday to Friday. This is a toll-free telephone number.