Suitability of non-metallic materials and products for use in contact with water intended for human consumption with regard to their effect on the quality of the water. Specification|Water, Water purification, Potable water, Odours, Microorganisms, Flexible pipes, Metals, Biological analysis and testing, Water supply, Appearance, Non-metals, High temperatures, Water pipes, Water storage, Water supply engineering, Taste tests, Extraction, Water supply and waste systems (buildings), Contaminants, Temperature, Water pipelines