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Water Regulations

"In July 1999, the Water Supply (Water Fittings Regulations) 1999 replaced local water byelaws in England and Wales."

They were made under section 74 of the Water Industry Act 1991 to prevent the waste, misuse, undue consumption, erroneous measurement or contamination of drinking water and set requirements for the design, installation and maintenance of plumbing systems and water fittings. The Regulations are enforceable by each water company as regards their own area of supply.

Water systems and fittings in premises that are, or will be, connected to the public water supply system must comply with the Regulations. If you are planning to carry out plumbing work for any of the following purposes, you must obtain our prior consent:

  • Erection of any new building or structure
  • Extension or alteration of the water system in any premises except a domestic dwelling
  • Material change in the use of any premises
  • Installation of any fitting listed in section 5 of the Regulations
  • Construction of a large pond or swimming pool with automatic replenishment.

IWNL has produced a Notification Form for your use.

Please see IWNL’s guide to Water supply (Water fittings) regulations 1999 to assist with any frequently asked questions on how to install compliant potable water pipes.

The Water Regulations Advisory Scheme (WRAS) has published a Water Regulations Guide which explains in more detail the requirements of the Regulations.

Please note that statutory requirements relating to drainage are provided for in the Building Act 1984 and associated Building Regulations.


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