SIST EN ISO 4064-5:2025
(Main)Water meters for cold potable water and hot water - Part 5: Installation requirements (ISO 4064-5:2025)
Water meters for cold potable water and hot water - Part 5: Installation requirements (ISO 4064-5:2025)
This document applies to water meters used to meter the volume of cold potable water and hot water flowing through a fully charged, closed conduit. These water meters incorporate devices which indicate the integrated volume.
This document specifies criteria for the selection of single, combination and concentric water meters, associated fittings, installation, special requirements for meters, and the first operation of new or repaired meters to ensure accurate constant measurement and reliable reading of the meter.
In addition to meters based on mechanical principles, this document also applies to water meters based on electrical or electronic principles, and to water meters based on mechanical principles incorporating 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 or international regulations may make some ancillary devices mandatory in relation to the utilization of the water meter.
The recommendations of this document 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.
Wasserzähler zum Messen von kaltem Trinkwasser und heißem Wasser - Teil 5: Einbaubedingungen (ISO 4064-5:2025)
Dieses Dokument gilt für Wasserzähler zur Volumenmessung von kaltem Trinkwasser und heißem Wasser, das durch eine vollständig gefüllte, geschlossene Leitung fließt. Diese Wasserzähler sind mit Einrichtungen versehen, die das kumulierte Volumen anzeigen.
Dieses Dokument legt Kriterien für die Auswahl von einzelnen Wasserzählern, Verbundzählern und konzentrischen Wasserzählern, zugehörigen Armaturen, den Einbau, besondere Anforderungen an Zähler und die Inbetriebnahme von neuen oder reparierten Zählern fest, um eine genaue konstante Messung und zuverlässige Ablesung der Zähler sicherzustellen.
Zusätzlich zu den auf mechanischen Funktionsprinzipien beruhenden Wasserzählern gilt dieses Dokument ebenfalls für Wasserzähler, die auf elektrischen oder elektronischen Funktionsprinzipien beruhen, und für Wasserzähler nach mechanischem Funktionsprinzip mit elektronischen Einrichtungen, die zur Messung des Volumens von kaltem Trinkwasser und heißem Wasser dienen. Es gilt außerdem für elektronische Zusatzeinrichtungen. Zusatzeinrichtungen sind optional. In nationalen oder internationalen Vorschriften können allerdings einige Zusatzeinrichtungen hinsichtlich der Verwendung von Wasserzählern verbindlich vorgeschrieben sein.
Die Empfehlungen dieses Dokuments gelten für Wasserzähler unabhängig von der Technologie, die als integrierende Messgeräte das Volumen des sie durchlaufenden Wassers bestimmen.
ANMERKUNG Im Verwendungsland gilt die nationale Gesetzgebung.
Compteurs d'eau potable froide et d'eau chaude - Partie 5: Exigences d'installation (ISO 4064-5:2025)
Le présent document s’applique aux compteurs d’eau utilisés pour mesurer le volume d’eau potable froide et d’eau chaude s’écoulant dans une conduite fermée et à pleine charge. Ces compteurs d’eau comportent des dispositifs indiquant le volume compté.
Le présent document spécifie des critères pour le choix de compteurs d’eau individuels, combinés et concentriques, les accessoires associés, l’installation ainsi que des exigences spéciales pour la première mise en service de compteurs neufs ou réparés pour garantir un mesurage d’une exactitude constante et une lecture fiable du compteur.
En plus des compteurs d’eau dont le fonctionnement est basé sur des principes mécaniques, le présent document s’applique aux dispositifs dont le fonctionnement est basé sur un principe électrique ou électronique, ainsi qu’à un fonctionnement mécanique incluant des dispositifs électroniques utilisés pour mesurer le volume débité d’eau potable froide et d’eau chaude. Il s’applique également aux dispositifs électroniques auxiliaires. Les dispositifs auxiliaires sont facultatifs. Il est cependant admis que des réglementations nationales ou régionales rendent certains dispositifs auxiliaires obligatoires selon l’utilisation du compteur d’eau.
Les recommandations du présent document s’appliquent aux compteurs d’eau, indépendamment de leur technologie, définis en tant qu’instruments de mesure totalisateurs de débit, déterminant de manière continue le volume de débit d’eau les traversant.
NOTE Toute réglementation nationale est applicable dans le pays d’utilisation.
Vodomeri za merjenje hladne pitne vode in vroče vode - 5. del: Zahteve za vgradnjo (ISO 4064-5:2025)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2025
Vodomeri za merjenje hladne pitne vode in vroče vode - 5. del: Zahteve za
vgradnjo (ISO 4064-5:2025)
Water meters for cold potable water and hot water - Part 5: Installation requirements
(ISO 4064-5:2025)
Wasserzähler zum Messen von kaltem Trinkwasser und heißem Wasser - Teil 5:
Einbaubedingungen (ISO 4064-5:2025)
Compteurs d'eau potable froide et d'eau chaude - Partie 5: Exigences d'installation (ISO
4064-5:2025)
Ta slovenski standard je istoveten z: EN ISO 4064-5:2025
ICS:
17.120.10 Pretok v zaprtih vodih Flow in closed conduits
91.140.60 Sistemi za oskrbo z vodo Water supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 4064-5
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2025
EUROPÄISCHE NORM
ICS 91.140.60 Supersedes EN ISO 4064-5:2017, EN ISO 4064-
5:2017/A11:2022
English Version
Water meters for cold potable water and hot water - Part
5: Installation requirements (ISO 4064-5:2025)
Compteurs d'eau potable froide et d'eau chaude - Wasserzähler zum Messen von kaltem Trinkwasser
Partie 5: Exigences d'installation (ISO 4064-5:2025) und heißem Wasser - Teil 5: Einbaubedingungen (ISO
4064-5:2025)
This European Standard was approved by CEN on 23 September 2025.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4064-5:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 4064-5:2025) has been prepared by Technical Committee ISO/TC 30
"Measurement of fluid flow in closed conduits " in collaboration with Technical Committee CEN/TC 92
“Water meters” the secretariat of which is held by SNV.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by April 2026, and conflicting national standards shall be
withdrawn at the latest by April 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 4064-5:2017.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 4064-5:2025 has been approved by CEN as EN ISO 4064-5:2025 without any
modification.
International
Standard
ISO 4064-5
Second edition
Water meters for cold potable water
2025-09
and hot water —
Part 5:
Installation requirements
Compteurs d'eau potable froide et d'eau chaude —
Partie 5: Exigences d'installation
Reference number
ISO 4064-5:2025(en) © ISO 2025
ISO 4064-5:2025(en)
© ISO 2025
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
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Published in Switzerland
ii
ISO 4064-5:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Criteria for the selection of water meters . . 2
4.1 General considerations.2
4.2 Information to be provided by the manufacturer .2
4.3 Meters operating in parallel or in a group .3
5 Associated fittings. 3
5.1 General .3
5.2 Upstream of the meter .3
5.3 Downstream of the meter.3
6 Installation . 4
6.1 General requirements .4
6.2 Installation requirements .4
6.3 Water quality (suspended particles) .5
6.4 Electromagnetic meters .5
6.5 Meters operating in parallel or in a group .5
6.6 Protection of installation .5
7 Hydraulic disturbances . 5
7.1 General considerations.5
7.2 Methods to eliminate disturbances .6
8 First operation of new or repaired water meters . 7
8.1 General considerations.7
8.2 Meters operating in parallel or in a group .7
8.3 Protection of the meter .7
8.3.1 Frost .7
8.3.2 Reverse water flow .7
8.3.3 Intentional fraud .8
8.3.4 Cartridge meters .8
8.3.5 Meters with exchangeable metrological modules .8
8.4 Safety of personnel and users .9
8.4.1 General .9
8.4.2 Manhole installation .10
8.4.3 Installation requirements for pipes greater than DN 40 .10
8.4.4 Protection against hazard related to electrical installations .10
8.5 Comfort of personnel — Access to the water meter and fittings .10
8.5.1 General considerations .10
8.5.2 Installation in manholes .10
Bibliography .12
iii
ISO 4064-5:2025(en)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotec
...
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