Auditing of Drinking Water Products

UK water companies are required by the Water Quality Regulations to use products approved by the Secretary of State for use in contact with drinking water (sometimes known as Regulation 31, Regulation 33 or DWI approval). Manufacturers of products must apply to the Secretary of State for approval. The approval ensures that products do not adversely affect drinking water quality. Water companies wish to gain assurance that products they are purchasing from these manufacturers are fully compliant with the requirement...