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 specified accuracy limits, the volume of cold drinking water at working temperature range of 0.3 degrees Celsius to 30 degrees Celsius and pressure not exceeding 1400 kPa, respectively.