SIST 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 may include specifications which are more stringent;
-   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;
-   significant modification and/or rehabilitation of existing water supply systems;
-   all those water infrastructure systems 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.
NOTE   It is not intended that existing water supply systems are to be altered to comply with this document, provided that there are no significant detrimental effects on water quantity, security, reliability and adequacy of the supply.

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;
-   Anforderungen für Bau, Prüfung und Inbetriebnahme.
Die Anforderungen dieses Dokuments gelten für:
-   die Planung und die Bauausführung neuer Wasserversorgungssysteme;
-   bedeutsame Erweiterungen bestehender Wasserversorgungssysteme;
-   bedeutsame Änderungen und/oder Sanierungen in bestehenden Wasserversorgungssystemen;
-   alle diese Wasserinfrastruktursysteme, 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.
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.

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 pour l'installation, les épreuves sur chantier et la mise en service.
Les exigences du présent document s'appliquent à :
-   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 ;
-   une modification et/ou une réhabilitation importante de réseaux d'alimentation en eau existants ;
-   toutes les infrastructures hydrauliques qui 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 du changement climatique/l'adaptation à ce phénomène.
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.

Oskrba z vodo - Zahteve za zunanje vodovode in dele

General Information

• Status: Published
• Public Enquiry End Date: 29-Jun-2022
• Publication Date: 26-Feb-2025
• ICS: 93.025 - External water conveyance systems
• Technical Committee: IOVO - Water supply and waste water engineering
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 20-Feb-2025
• Due Date: 27-Apr-2025
• Completion Date: 27-Feb-2025
• 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: EN 805:2025 - Water supply - Requirements for systems and components outside buildings

Relations

• Revised: SIST EN 805:2000 - Water supply - Requirements for systems and components outside buildings
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2025
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: EN 805:2025
ICS:
93.025 Zunanji sistemi za prevajanje External water conveyance
vode systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 805
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2025
EUROPÄISCHE NORM
ICS 93.025 Supersedes 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 European Standard was approved by CEN on 29 December 2024.

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 805:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 7
Introduction . 8
1 Scope . 9
2 Normative references . 9
3 Terms and definitions .10
3.1 General .10
3.2 System .11
3.3 Components .14
3.4 Diameters .16
3.5 Installation .16
3.6 Hydraulic design .18
3.7 Structural design .18
4 Requirements for water supply systems .19
4.1 Water quality and regulatory framework .19
4.1.1 General .19
4.1.2 Materials .19
4.1.3 Prevention of back flow .19
4.1.4 Stagnation .19
4.1.5 Cross-connections with other systems .19
4.1.6 Contaminated soil .20
4.2 Planning horizon for water supply systems .20
4.3 Demand for water .20
4.3.1 Water demand estimates .20
4.3.2 Water for firefighting .20
4.4 System hazards and security.20
5 Service levels .21
6 Rehabilitation .21
7 Design .21
7.1 Design objectives .21
7.2 Peak flow factors .21
7.3 Hydraulic design .21
7.3.1 Sizing .21
7.3.2 Hydraulic calculations .22
7.3.3 Hydraulic roughness value .23
7.3.4 Flow velocities .23
7.3.5 Network analysis .23
7.3.6 Local mains .23
7.3.7 Service pipes .23
7.4 Structural design .24
7.4.1 General .24
7.4.2 Internal forces .24
7.4.3 External forces .24
7.4.4 Temperature range .24
7.4.5 Unbalanced thrust .24
7.4.6 Design requirements .24

7.4.7 Hydrostatic design requirements . 25
7.4.8 Unforeseen ground conditions . 26
7.5 System layout . 26
7.5.1 Mains . 26
7.5.2 Types of system configurations . 27
7.5.3 Service pipes . 27
7.5.4 Valves . 27
7.5.5 Surge limiting equipment . 28
7.6 Protection against aggressive environment . 28
7.7 Reservoirs . 28
7.8 Pumping stations . 28
7.9 Design service life . 28
7.10 Documentation . 29
8 General requirements for products . 29
8.1 General . 29
8.2 Materials . 29
8.3 Dimensions . 29
8.3.1 Nominal sizes . 29
8.3.2 Internal diameters . 29
8.3.3 Length and wall thickness . 30
8.3.4 Geometry of pipes, fittings, and valves . 30
8.3.5 Internal surface . 30
8.3.6 Appearance and soundness . 30
8.4 Structural design. 30
8.5 Mechanical requirements . 31
8.5.1 Circumferential resistance . 31
8.5.2 Longitudinal resistance . 31
8.6 Water tightness . 31
8.7 Joints. 31
8.7.1 General .
...