This Malaysian Standard specifies terminology, technical characteristics, metrological characteristics and pressure loss requirements for cold potable water and hot water meters. It applies to water meters that can with stand maximum admissible working pressures (MAP) ≥ MPa1) (0,6 MPa for meters for use with pipe nominal diameters, DN ≥ 500 mm) and a maximum admissible temperature, MAT, for cold potable water meters of 30 oC and for hot water meters up to 180 oC, depending on class. This Malaysian Standard also applies to water meters, based on electrical or electronic principles and to water meters based on mechanical principles incorporating electronic devices, used to meter the actual volume flow of cold potable water and hot water. It also applies to electronic ancillary devices. Generally ancillary devices are optional. The specifications of this Malaysian Standard apply to water meters, irrespective of technology, defined as integrating measuring instruments continuously determining the volume of water flowing through them.

等同采用ISO 4064-1:2005, Measurement of water flow in fully charged closed conduits – Meters for cold potable water and hot water – Part 1: Specifications