SIST EN ISO 15875-3:2026
(Main)Plastics piping systems for hot and cold water installations - Crosslinked polyethylene (PE-X) - Part 3: Fittings (ISO 15875-3:2025)
Plastics piping systems for hot and cold water installations - Crosslinked polyethylene (PE-X) - Part 3: Fittings (ISO 15875-3:2025)
This document specifies the characteristics of fittings for crosslinked polyethylene (PE-X) piping systems intended to be used for hot and cold water installations within buildings for the conveyance of water, whether or not intended for human consumption (domestic systems) and for heating systems under design pressures and temperatures according to the class of application (see ISO 15875-1:—, Table 1).
This document also specifies the test parameters for the test methods referred to herein.
This document is applicable to fittings made from PE-X or other plastics or non-plastics materials, which are intended to be connected to pipes conforming to ISO 15875-2 for hot and cold water installations, whereby the joints conform to the requirements of ISO 15875-5.
This document is applicable to fittings of the following types:
— mechanical fittings;
— electrofusion fittings;
Kunststoff-Rohrleitungssysteme für die Warm- und Kaltwasserinstallation– Vernetztes Polyethylen (PE-X)– Teil3: Formstücke (ISO 15875-3:2025)
Dieses Dokument legt die Eigenschaften von Formstücken für Rohrleitungssysteme aus vernetztem Polyethylen (PE-X) fest, die in der Warm- und Kaltwasserinstallation innerhalb von Gebäuden für den Transport von Wasser für den menschlichen Gebrauch oder Brauchwasser (Hausinstallation) sowie für Heizungsanlagen unter Berücksichtigung des betreffenden zulässigen Betriebsdrucks und der für die jeweilige Anwendungsklasse geltenden Temperaturen (siehe ISO 15875 1:—, Tabelle 1) eingesetzt werden.
Dieses Dokument legt auch die Prüfparameter für die Prüfverfahren fest, auf die im vorliegenden Dokument verwiesen wird.
Dieses Dokument gilt für Formstücke aus PE-X, anderen Kunststoffen oder Nichtkunststoff-Werkstoffen, die für die Verbindung mit Rohren nach ISO 15875 2 in der Warm- und Kaltwasserinstallation vorgesehen sind und deren Verbindungen den Anforderungen von ISO 15875 5 entsprechen.
Dieses Dokument gilt für die folgenden Arten von Formstücken:
- Formstücke für mechanische Verbindungen;
- Formstücke für Heizwendelschweißung.
Systèmes de canalisations en plastique pour les installations d'eau chaude et froide - Polyéthylène réticulé (PE-X) - Partie 3: Raccords (ISO 15875-3:2025)
Le présent document spécifie les caractéristiques des raccords pour les systèmes de canalisations en polyéthylène réticulé (PE-X) destinés à des installations d'eau chaude et froide à l'intérieur des bâtiments ainsi qu'au transport de l'eau, destinée ou non à la consommation humaine (systèmes domestiques) et aux installations de chauffage à des pressions et des températures de service correspondant à la classe d'application (voir ISO 15875-1:2025, Tableau 1).
Il spécifie également les paramètres d'essai pour les méthodes d'essai qui y sont référencées.
Le présent document s'applique aux raccords fabriqués en PE-X ou en d'autres matières plastiques ou non plastiques, qui sont destinés à être connectés à des tubes conformes à l'ISO 15875-2 pour des installations d'eau chaude et froide, les assemblages étant conformes aux exigences de l'ISO 15875-5.
Le présent document s'applique aux raccords des types suivants:
— raccords mécaniques;
— raccords électrosoudables.
Cevni sistemi iz polimernih materialov za napeljave z vročo in hladno vodo - Zamreženi polietilen (PE-X) - 3. del: Fitingi (ISO 15875-3:2025)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2026
Cevni sistemi iz polimernih materialov za napeljave z vročo in hladno vodo -
Zamreženi polietilen (PE-X) - 3. del: Fitingi (ISO 15875-3:2025)
Plastics piping systems for hot and cold water installations - Crosslinked polyethylene
(PE-X) - Part 3: Fittings (ISO 15875-3:2025)
Kunststoff-Rohrleitungssysteme für die Warm- und Kaltwasserinstallation– Vernetztes
Polyethylen (PE-X)– Teil3: Formstücke (ISO 15875-3:2025)
Systèmes de canalisations en plastique pour les installations d'eau chaude et froide -
Polyéthylène réticulé (PE-X) - Partie 3: Raccords (ISO 15875-3:2025)
Ta slovenski standard je istoveten z: EN ISO 15875-3:2025
ICS:
23.040.45 Fitingi iz polimernih Plastics fittings
materialov
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 15875-3
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2025
EUROPÄISCHE NORM
ICS 23.040.45; 91.140.60 Supersedes EN ISO 15875-3:2003, EN ISO 15875-
3:2003/A1:2020, EN ISO 15875-3:2003/A2:2021
English Version
Plastics piping systems for hot and cold water installations
- Crosslinked polyethylene (PE-X) - Part 3: Fittings (ISO
15875-3:2025)
Systèmes de canalisations en plastique pour les Kunststoff-Rohrleitungssysteme für die Warm- und
installations d'eau chaude et froide - Polyéthylène Kaltwasserinstallation - Vernetztes Polyethylen (PE-X)
réticulé (PE-X) - Partie 3: Raccords (ISO 15875- - Teil 3: Formstücke (ISO 15875-3:2025)
3:2025)
This European Standard was approved by CEN on 23 October 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 15875-3:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 15875-3:2025) has been prepared by Technical Committee ISO/TC 138
"Plastics pipes, fittings and valves for the transport of fluids" in collaboration with Technical Committee
CEN/TC 155 “Plastics piping systems and ducting systems” the secretariat of which is held by NEN.
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 15875-3:2003, EN ISO 15875-3:2003/A1:2020, EN ISO 15875-
3:2003/A2:2021.
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 15875-3:2025 has been approved by CEN as EN ISO 15875-3:2025 without any
modification.
International
Standard
ISO 15875-3
Second edition
Plastics piping systems for hot
2025-10
and cold water installations —
Crosslinked polyethylene (PE-X) —
Part 3:
Fittings
Systèmes de canalisations en plastique pour les installations
d'eau chaude et froide — Polyéthylène réticulé (PE-X) —
Partie 3: Raccords
Reference number
ISO 15875-3:2025(en) © ISO 2025
ISO 15875-3:2025(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
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
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Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 15875-3:2025(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols . 2
3.1 Terms and definitions .2
3.1.1 General .2
3.1.2 Mechanical fittings .3
3.2 Symbols .4
4 Generic requirements, instructions and explanations. 4
4.1 Designation PE-X .4
4.2 Application classes, design pressures and pipe dimension classes restrictions .4
4.3 Application classes — Responsibility of the purchaser or specifier .4
4.4 Use of the parts of the ISO 15875 series .5
4.5 Completeness of tests .5
4.6 Test result interchangeability restriction .5
5 Material characteristics . 5
5.1 Plastics fitting body material subjected to hydrostatic stress .5
5.2 Plastics material of auxiliary fittings parts subjected to mechanical stress .8
5.3 Metallic fitting body material .8
5.4 Influence on water intended for human consumption .8
6 General characteristics . 8
6.1 Appearance .8
6.1.1 Appearance of plastic fittings .8
6.1.2 Appearance of metal fittings .9
6.2 Opacity .9
7 Geometrical characteristics . 9
7.1 General .9
7.1.1 Overview .9
7.1.2 Nominal diameter(s) .9
7.1.3 Angles .9
7.1.4 Threads .9
7.2 Dimensions of sockets for electro-fusion fittings .9
7.3 Dimensions of metallic fittings — Minimum wall thickness of fittings made of copper
alloys .11
8 Mechanical characteristics of plastics fittings .11
8.1 General .11
8.2 Fitting made from a PE-X material . 12
8.3 Fitting made from plastics material other than PE-X and specified by an ISO standard
according to Annex B . 13
8.4 Fitting made from plastics material not specified by an ISO standard according to
Annex B .14
9 Physical and chemical characteristics .
...
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