Water Supply Water Fittings Regulations - Cambridge Water

Water Supply Water Fittings Regulations 1999

The Water Supply (Water Fittings) Regulations 1999 are national requirements for the design, installation, composition and maintenance of water fittings and water-using appliances.

These regulations are designed to protect consumers and the environment from poor water quality, unnecessary waste, misuse, and the contamination of wholesome water supplies.

All water systems must comply with the above regulations and can be subject to inspection.

Keeping water safe in premises - Our policy for the enforcement of the Water Supply (Water Fittings) Regulations 1999

Where do they apply?

Since 1 July 1999, in England and Wales all plumbing systems, water fittings and equipment supplied, or to be supplied, with water from the public water supply come under these regulations. This applies to systems in all types of premises.

A plumbing system includes the premises’ underground service pipe from the point connecting it to the water main, to where the water is drawn off for use.

They also apply to plumbing systems that use a private water supply and have a mains backup provided by Cambridge Water.

Click here to access some useful diagrams.

Where do they not apply?

They do not apply where a property uses a private water supply and does not have a supply of water from Cambridge Water. However, it is good plumbing practice to follow the requirements of the regulations.

Who has to comply?

Owners and occupiers of premises and anyone who installs plumbing systems or water fittings have the legal duty to ensure that the systems satisfy the regulations.

In most cases, advanced notice must be given for proposed installations, so architects, building developers and plumbers have to follow the regulations on behalf of future owners or occupiers.

Who is responsible for enforcing the regulations?

The regulator is the Minister of State for the Environment and Agri-Environment. View the DEFRA website for more details.

The Government requires water suppliers to enforce the regulations within their area of supply. As with the previous water supply byelaws, Cambridge Water will undertake inspections of new and existing installations to check that the regulations are being met. Where breaches of the regulations are found, Cambridge Water will require them to be remedied as soon as practicable. Where breaches pose a risk to health, the water supply to the premises may be disconnected immediately to protect the health of occupants or others fed from the same public supply. It is a criminal offence to breach the regulations and offenders may face prosecution.

If we are not your water supplier you can find who is your local regulation contact from the WRAS website.

Where can I find out more?

An overview of the Water Supply Water Fittings Regulations, together with detailed information for plumbers and contractors is available from the Water Regulations Advisory Scheme (WRAS)


They are also available to download via the DEFRA website together with guidance documentation


Cambridge Water cannot provide a design service for installations but we will try to answer individual queries from customers, designers, builders and installers about the interpretation of the regulations. You can contact our regulations team by emailing regulations@cambridge-water.co.uk. We can also provide copies of the regulations upon request.

The text of all these documents is included with detailed Water Industry guidance and interpretation in the Water Regulations Guide, available from the Water Regulations Advisory Scheme.

WRAS Information on Notification of Proposed Plumbing Work

Alternatively you can contact WRAS at:

The Water Regulations Advisory Scheme (WRAS):
Fern Close
Pen-y-Fan Industrial Estate
NP11 3EH

Tel: 01495 248454
E-mail: info@wras.co.uk