Water meters for cold potable water and hot water - Part 5: Installation requirements (ISO 4064-5:2025)

This technical specification addresses the essential installation requirements for meters used to measure cold potable water and hot water consumption. It establishes the necessary criteria for placing, connecting, and commissioning such devices to ensure accurate and reliable measurements in various hydraulic systems. The document outlines specific conditions regarding the positioning of meters in relation to upstream and downstream pipework, the necessity of straight pipe sections, and the protection of the meter from physical damage or environmental factors. It provides guidance on the orientation of meters, the arrangement of valves and filters, and the requirements for sealing and identification. These provisions are designed to harmonize installation practices across the industry, thereby minimizing measurement errors caused by improper setup and ensuring the longevity and performance of water metering systems. The content serves as a critical component within a broader framework governing the technical behavior of measurement instruments, focusing exclusively on the physical deployment phase rather than design or testing protocols.