Water fittings regulations

Last reviewed:

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

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

The 'Water Supply (Water Fittings) Regulations 1999' supersede local water byelaws in England and Wales.

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

In certain circumstances customers are required to notify their local water company before commencing any plumbing work.

A full list of criteria is detailed within the regulations, but it should be noted that most work in domestic properties could be installed without the need for notification.

However, domestic plumbing systems can be subject to inspection and enforcement.

Visit the Water Regulations Advisory Scheme website

Contact us

If you would like more information on water fittings regulation, you can contact in the following ways:

Emails us

Please send your email to: water.regulations@thameswater.co.uk

Write to us

Thames Water 
Water Regulations 
Highworth Depot
PO Box 286
Swindon
SN38 2RN

Alternatively you can call us.

Approved plumbers scheme

To help customers to find a Water Regulations approved plumber, we operate an approved plumbers scheme.

These plumbers can carry out approved plumbing work, and issue a legal certificate of compliance, without the need to notify us.

We vet each member of our Approved Plumbers Scheme to make sure they are qualified and have the required water regulations knowledge.

Each member is also audited every year and must produce evidence of public and employers' liability insurance.

To find a plumber in your area that may be able to help you, please see our approved plumbers list.

Find an approved plumber