BS 6920-1. Suitability of non-metallic materials & 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 supply, Potable water, Water supply & waste systems (buildings), Non-metals, Water supply engineering, Water pipes, Water pipelines, Water storage, Temperature, Water purification, Odours, Taste tests, Appearance, Biological analysis & testing, Microorganisms, Extraction, Contaminants, Metals, High temperatures, Flexible pipes