UNE-EN ISO 4064-5:2026

This part of ISO 4064 applies to water meters used to meter the volume of cold potable water and hotwater flowing through a fully charged, closed conduit. These water meters incorporate devices whichindicate the integrated volume.This part of ISO 4064 specifies criteria for the selection of single, combination and concentric watermeters, associated fittings, installation, special requirements for meters, and the first operation of newor repaired meters to ensure accurate constant measurement and reliable reading of the meter.In addition to meters based on mechanical principles, this part of ISO 4064 also applies to watermeters based on electrical or electronic principles, and to water meters based on mechanical principlesincorporating electronic devices, used to measure the volume of cold potable water and hot water.It also applies to electronic ancillary devices. Ancillary devices are optional. However, national orinternational regulations may make some ancillary devices mandatory in relation to the utilization ofthe water meter.The recommendations of this part of ISO 4064 apply to water meters, irrespective of technology,defined as integrating measuring instruments determining the volume of water flowing through them.NOTE Any national regulations apply in the country of use.