Understanding the Water Supply (Water Fittings) Regulations 1999

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

What the regulations are for

The regulations prevent waste, misuse, undue consumption, erroneous measurement and prevent contamination.

Notifying the water company of work

In most cases, the installer, owner or occupier must give us advance notice of proposed work.

It is not possible to begin work until we have given consent.

Consent will not be withheld unreasonably, and may be granted subject to conditions, which must be followed.

If consent is not given within ten working days, it is deemed to have been granted. 

The installer, owner or occupier must make sure work meets the Regulations.

Enforcing the regulations

The Government require us, the water company, to enforce the regulations.

We will inspect installations, in line with our enforcement policy [PDF]

As the owner, occupier or installer, it is your legal duty to ensure the systems meet the requirements. Where we find breaches of the regulations, you must correct the work.

Carrying out work at marine sites like boatyards

If you need to carry out plumbing work at a marine location such as a boatyard or dock, read the industry best practice guidance for inland and coastal marine work [PDF] to make sure your project is compliant.

Contact the team

You can contact our Water Regulations team by email, you can call on 0345 266 7922 or write to:

Hafren Dyfrdwy, Water Fittings Dept

West Service Road, Raynesway

Derby DE21 7BE