EN 805:2025

Water supply - Requirements for systems and components outside buildings

This document specifies:
-   general requirements for water supply systems outside buildings including potable water mains and service pipes, service reservoirs, other facilities and raw water mains but excluding treatment works and water resources development;
-   general requirements for components;
-   general requirements for inclusion in product standards which can include specifications which are more stringent;
-   general requirements for installation, site testing and commissioning.
The requirements of this document apply to:
-   the design and construction of new water supply systems;
-   the extension of significant areas forming a coherent part of an existing water supply system;
-   interconnections between water supply systems;
-   significant modification and/or rehabilitation of existing water supply systems.
NOTE   It is not intended that existing water supply systems are altered to comply with this document, provided that there are no significant detrimental effects on water quantity, security, reliability and adequacy of the supply. However, this document is intended to cover all water infrastructure systems mentioned above since they are key to meet the sustainable goals of the cities and to show the urgent need to invest in them in order to consider fundamental aspects, such as resilience or mitigation/adaptation to climate change.

Wasserversorgung - Anforderungen an Wasserversorgungssysteme und deren Bauteile außerhalb von Gebäuden

Dieses Dokument legt Folgendes fest:
   allgemeine Anforderungen an Wasserversorgungssysteme außerhalb von Gebäuden; hierzu gehören Trinkwasserleitungen und Anschlussleitungen, Trinkwasserbehälter, sonstige Anlagen und Rohwasserleitungen, jedoch keine Wasseraufbereitungs- und Wassergewinnungsanlagen;
   allgemeine Anforderungen an Rohrleitungsteile;
   allgemeine Anforderungen zur Aufnahme in die Produktnormen, welche strengere Bestimmungen enthalten können;
   allgemeine Anforderungen für Bau, Prüfung und Inbetriebnahme.
Die Anforderungen dieses Dokuments gelten für:
   die Planung und die Bauausführung neuer Wasserversorgungssysteme;
   bedeutsame Erweiterungen bestehender Wasserversorgungssysteme;
   Verbindungen zwischen Wasserversorgungssystemen;
   bedeutsame Änderungen und/oder Sanierungen in bestehenden Wasserversorgungssystemen.
ANMERKUNG   Es ist nicht beabsichtigt, bestehende Wasserversorgungssysteme zu verändern, um diesem Dokument zu entsprechen, sofern von diesen keine bedeutsamen nachteiligen Einflüsse auf das Wasservolumen, Sicherheit, Zuverlässigkeit und Angemessenheit der Versorgung ausgehen. Dieses Dokument soll jedoch alle oben genannten Wasserinfrastruktursysteme abdecken, da sie der Schlüssel zur Erreichung der nachhaltigen Ziele der Städte sind und die dringende Notwendigkeit aufzeigen, in sie zu investieren, um grundlegende Aspekte wie die Belastbarkeit oder den Klimaschutz/ die Adaption an Klimaänderungen zu berücksichtigen.

Alimentation en eau - Exigences pour les réseaux extérieurs aux bâtiments et leurs composants

Le présent document spécifie :
—   des exigences générales pour les réseaux d'alimentation extérieurs aux bâtiments, comprenant les conduites principales et de branchement d'eau potable, les réservoirs de réseau, les autres installations et les conduites d'eau brute, mais excluant les usines de traitement des eaux et le développement des ressources en eau ;
—   des exigences générales pour les composants ;
—   des exigences générales destinées à être incluses dans les normes de produits, lesquelles peuvent inclure des spécifications plus rigoureuses ;
—   des exigences générales pour l'installation, les épreuves sur chantier et la mise en service.
Les exigences du présent document s'appliquent :
—   la conception et la réalisation de réseaux neufs d'alimentation en eau ;
—   l'extension de zones importantes constituant une partie cohérente d'un réseau d'alimentation en eau existant ;
—   aux interconnexions entre différents réseaux d'alimentation en eau ;
—   à une modification et/ou une réhabilitation importante de réseaux d'alimentation en eau existants.
NOTE   Il n'est pas prévu que les réseaux d'alimentation en eau existants soient modifiés pour se conformer au présent document, pourvu qu'ils ne portent pas atteinte de façon significative à la qualité de l'eau, à la sécurité, à la fiabilité et à l'adéquation de l'alimentation. Toutefois, le présent document est destiné à couvrir toutes les infrastructures hydrauliques susmentionnées, dans la mesure où elles jouent un rôle déterminant pour atteindre les objectifs de durabilité des villes et montrer l'urgence des investissements nécessaires pour prendre en compte les aspects fondamentaux, tels que la résilience ou l'atténuation/l’adaptation au changement climatique.

Oskrba z vodo - Zahteve za zunanje vodovode in dele

General Information

• Status: Not Published
• Publication Date: 11-Feb-2025
• ICS: 93.025 - External water conveyance systems
• Technical Committee: CEN/TC 164 - Water supply
• Drafting Committee: CEN/TC 164/WG 1 - External systems and components
• Current Stage: 5060 - Closure of Vote - Formal Approval
• Start Date: 28-Nov-2024
• Due Date: 09-Feb-2023
• Completion Date: 28-Nov-2024
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 93/38/EEC - Procurement procedures of entities operating in the water, energy, transport and telecommunications sectors
• Ref Project: kSIST FprEN 805:2024 - Water supply - Requirements for systems and components outside buildings

Relations

• Revises: EN 805:2000 - Water supply - Requirements for systems and components outside buildings
• Effective Date: 06-Jun-2018

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 805:2022
01-junij-2022
Oskrba z vodo - Zahteve za zunanje vodovode in dele
Water supply - Requirements for systems and components outside buildings
Wasserversorgung - Anforderungen an Wasserversorgungssysteme und deren Bauteile
außerhalb von Gebäuden
Alimentation en eau - Exigences pour les réseaux extérieurs aux bâtiments et leurs
composants
Ta slovenski standard je istoveten z: prEN 805
ICS:
93.025 Zunanji sistemi za prevajanje External water conveyance
vode systems
oSIST prEN 805:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 805:2022
oSIST prEN 805:2022
DRAFT
EUROPEAN STANDARD
prEN 805
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2022
ICS 93.025 Will supersede EN 805:2000
English Version
Water supply - Requirements for systems and components
outside buildings
Alimentation en eau - Exigences pour les réseaux Wasserversorgung - Anforderungen an
extérieurs aux bâtiments et leurs composants Wasserversorgungssysteme und deren Bauteile
außerhalb von Gebäuden
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 164.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Turkey and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 805:2022 E
worldwide for CEN national Members.

oSIST prEN 805:2022
prEN 805:2022 (E)
Contents Page
European foreword . 7
Introduction . 8
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 9
3.1 Pressures .10
3.2 System .11
3.3 Components .15
3.4 Diameters .17
3.5 Installation .17
3.6 Hydraulic design .19
3.7 Structural design .20
4 Requirements for water supply systems .20
4.1 Water quality .20
4.1.1 General .20
4.1.2 Materials .20
4.1.3 Prevention of back flow .21
4.1.4 Stagnation .21
4.1.5 Cross-connections with other systems .21
4.2 Planning horizon for water supply systems .21
4.3 Demand for water .22
4.3.1 Water demand estimates .22
4.3.2 Water for fire fighting .22
4.4 System hazards and security.22
5 Service levels .22
6 Rehabilitation .22
7 Design .22
7.1 Design objectives .22
7.2 Peak flow factors .23
7.3 Hydraulic design .23
7.3.1 Sizing .23
7.3.2 Mains .23
7.3.3 Network analysis .25
7.3.4 Service pipes .25
7.4 Structural design .25
7.4.1 General .25
7.4.2 Internal forces .25
7.4.3 External forces .26
7.4.4 Temperature range .26
7.4.5 Unbalanced thrust .26
7.4.6 Design requirements .26
7.4.7 Hydrostatic design requirements .26
7.4.8 Unforeseen ground conditions .27
7.5 System layout .27
oSIST prEN 805:2022
prEN 805:2022 (E)
7.5.1 Mains . 27
7.5.2 Types of system configurations . 28
7.5.3 Service pipes . 28
7.5.4 Valves . 28
7.5.5 Surge limiting equipment . 29
7.6 Protection against aggressive environment . 29
7.7 Reservoirs . 29
7.8 Pumping stations . 29
7.9 Planned Service Life . 29
7.10 Documentation . 30
8 General requirements for product standards . 30
8.1 General . 30
8.2 Materials . 30
8.3 Dimensions . 30
8.3.1 Nominal sizes . 30
8.3.2 Internal diameters . 31
8.3.3 Length and wall thickness . 31
8.3.4 Geometry of pipes, fittings, and valves . 31
8.3.5 Internal surface . 31
8.3.6 Appearance and soundness . 31
8.4 Structural design. 32
8.5 Mechanical requirements . 32
8.5.1 Circumferential resistance . 32
8.5.2 Longitudinal resistance . 32
8.6 Water tightness . 32
8.7 Joints. 32
8.7.1 General . 32
8.7.2 Rigid joints .
...