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The Water Regulations Advisory Scheme (WRAS) is the UK Water Industry's approval scheme. Products approved by the scheme have been shown to comply with the requirements of the Water Supply (Water Fittings) Regulations 1999 and amendments. These regulations are designed for the prevention of waste, undue consumption, misuse or contamination of the drinking water. The WRAS specifies tests to determine whether products used on consumer premises conform to the Regulations.

The tests that WRAS complete are:

  • Odour and flavour of water in contact with the material
  • Appearance of water in contact with the material
  • Growth of aquatic micro-organisms on the material
  • Extraction of substances that may be of concern to public health
  • Extraction of metals.