Specifies requirements for volumetric chamber and turbine meters with nominal flow rates not exceeding 40 kL/h and 250 kL/h, respectively, which may be fitted with electronic output devices (EOD). These meters are intended for installation in water services to measure, within the accuracy limits of the Class, the volume of cold potable water at working temperatures and pressures not exceeding 30 degrees Celsius and 1400 kPa, respectively.