This European standard applies primarily to copper alloy ball valves, dimensions DN 8 to DN 100, for potable water supply in buildings up to PN 10 and a distribution temperature of 65 °C. Occasional excursions up to 90 °C are permitted for a period of 1 h maximum. This standard applies also to ball valves in combination with other components in the same body. This standard specifies: - the requirements of the materials and the design of ball valves; - the mechanical, hydraulic and acoustic requirements of ball valves; - the test methods to verify the requirements of ball valves; - the marking requirements of ball valves. Ball valves in combination with other valves should fulfil the same requirements.