prEN 806-2

Specification for installations inside buildings conveying water intended for human consumption - Part 2: Design

This document specifies requirements for and gives recommendations on the design of potable water installations according to EN 806-1.

Technische Regeln für Trinkwasser-Installationen - Teil 2: Planung

Dieses Dokument legt Anforderungen und Empfehlungen für die Planung von Trinkwasserinstallationen nach EN 806-1 fest.

Spécifications techniques relatives aux installations pour l’eau destinée à la consommation humaine à l’intérieur des bâtiments - Partie 2 : Conception

Le présent document spécifie les exigences et donne des recommandations sur la conception des installations d’eau potable conformément à l’EN 806-1.

Specifikacija za napeljave za pitno vodo v stavbah - 2. del: Načrtovanje

General Information

• Status: Not Published
• Publication Date: 08-Oct-2025
• ICS: 91.140.60 - Water supply systems
• Technical Committee: CEN/TC 164 - Water supply
• Drafting Committee: CEN/TC 164/WG 2 - Internal systems and components
• Current Stage: 4020 - Submission to enquiry - Enquiry
• Start Date: 19-Sep-2024
• Due Date: 23-May-2024
• Completion Date: 19-Sep-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
• Mandate: M/BC/CEN/88/15 - Standardization request to CEN/CENELEC in the field of Water supply, drainage and sewerage
• Ref Project: oSIST prEN 806-2:2024 - Specification for installations inside buildings conveying water intended for human consumption - Part 2: Design

Relations

• Revises: EN 806-2:2005 - Specification for installations inside buildings conveying water for human consumption - Part 2: Design
• Effective Date: 30-Aug-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2024
Specifikacija za napeljave za pitno vodo v stavbah - 2. del: Načrtovanje
Specification for installations inside buildings conveying water intended for human
consumption - Part 2: Design
Technische Regeln für Trinkwasser-Installationen - Teil 2: Planung
Spécifications techniques relatives aux installations pour l’eau destinée à la
consommation humaine à l’intérieur des bâtiments - Partie 2 : Conception
Ta slovenski standard je istoveten z: prEN 806-2
ICS:
13.060.20 Pitna voda Drinking water
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.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2024
ICS 91.140.60 Will supersede EN 806-2:2005
English Version
Specification for installations inside buildings conveying
water intended for human consumption - Part 2: Design
Spécifications techniques relatives aux installations Technische Regeln für Trinkwasser-Installationen -
d'eau destinée à la consommation humaine à Teil 2: Planung
l'intérieur des bâtiments - Partie 2: Conception
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, Türkiye 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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 806-2:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Basics requirements for design . 9
4.1 Design . 9
4.2 Optimization of the potable water installation . 9
4.3 Documentation . 10
4.3.1 General. 10
4.3.2 Room manual . 10
4.3.3 System manual . 10
4.3.4 Maintenance plan. 11
4.4 Preservation of potable water quality . 11
4.4.1 Connection to a service pipeline . 11
4.4.2 Hygiene . 11
4.5 Pipework . 13
4.5.1 General. 13
4.5.2 Pipework – factors that influence the design-principles . 16
4.5.3 Floor service pipe . 17
4.5.4 Examples for pipework in separate shafts . 18
4.5.5 Pre-wall installation with PWH-C (heat zones) (System type A) . 21
4.5.6 Linear expansion . 21
4.5.7 Pipe supports and fixings . 22
4.5.8 Pipes passing through structural elements and walls . 22
4.5.9 Differentiation and identification of pipes and components . 22
4.5.10 Heat Traps . 23
4.6 Pipe joints . 24
4.6.1 General. 24
4.6.2 Commonly used main types of joints . 24
4.6.3 Commonly used types of joints and the associated standards for different pipe
materials . 24
4.7 Flexible Hoses . 25
4.8 Potable water draw-off points . 26
4.9 Acoustics . 26
4.9.1 General. 26
4.9.2 Acoustics of pipework . 26
4.9.3 Wall and floor penetration . 26
4.9.4 Fixing elements . 26
4.9.5 Acoustics in components . 27
4.9.6 Pipe Sizing . 27
4.10 Scald protection . 27
4.10.1 General. 27
4.10.2 Pipework Surface temperatures . 27
4.11 Structural fire protection . 27
5 Materials . 28
5.1 General. 28
5.2 Choice of materials . 28
5.2.1 Selection of material . 28
5.2.2 Aspects for the selection of materials . 29
5.3 Corrosion . 29
5.3.1 Internal corrosion . 29
5.3.2 External corrosion. 30
5.4 Characteristics of commonly used materials . 30
5.4.1 General . 30
5.4.2 Copper and copper alloys . 31
5.4.3 Stainless steel . 31
5.4.4 Plastics . 31
6 Components . 32
6.1 Basic aspects . 32
6.1.1 General . 32
6.1.2 Appliance . 32
6.2 Basic components . 32
6.2.1 Stop valves . 32
6.2.2 Expansion joints . 32
6.2.3 Draw-off taps . 32
6.2.4 Protection unit . 32
6.2.5 Safety device . 33
6.2.6 Pressure reducing valves . 34
6.3 Components for specific installations . 36
6.3.1 PWH systems . 36
6.3.2 Potable water installations and firefighter s
...