Specifies the requirements for combination meters, with nominal flow rates not exceeding 150 kL/h and consisting of one small meter and one large meter in parallel, with a changeover device. These combination meters are intended for installation in water services, to measure within the accuracy of its Class, the volume of cold potable water at working temperatures and pressures not exceeding 30 degrees Celsius and 1400 kPa, respectively. These combination meters shall be capable of operating at working temperatures of at least 50 degrees Celsius and may be fitted with electronic output devices (EOD).