EN 806-2:2005

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

This document gives recommendations, and specifies requirements, on the design of potable water installations within buildings and for pipework outside buildings but within the premises (see EN 806-1) and applies to new installations, alterations and repairs.

Technische Regeln für Trinkwasser-Installationen - Teil 2: Planung

Dieses Dokument gibt Empfehlungen und beschreibt die Anforderungen an die Planung von Trinkwasser-Installationen innerhalb von Gebäuden und für Leitungsteile außerhalb von Gebäuden, aber innerhalb von Grundstücken (siehe EN 806-1) und ist anwendbar für Neuinstallationen, Umbau und Reparaturen.

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

La présente partie de la Norme européenne donne des recommandations et énonce les exigences concernant la conception des installations d'eau potable à l'intérieur des bâtiments, et dans certains cas, les canalisations à l'extérieur des bâtiments mais dans les limites de propriété (voir EN 806-1) ; et s'applique aux nouvelles installations, modifications et réparations.

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

General Information

• Status: Published
• Publication Date: 15-Mar-2005
• Withdrawal Date: 29-Sep-2005
• 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: 9093 - Decision to confirm - Review Enquiry
• Completion Date: 21-Jun-2022
• 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: 89/106/EEC - Construction products
• Directive: 93/38/EEC - Procurement procedures of entities operating in the water, energy, transport and telecommunications sectors
• Mandate: M/BC/CEN/88/15 - Standardization request to CEN/CENELEC in the field of Water supply, drainage and sewerage
• Ref Project: SIST EN 806-2:2005 - Specification for installations inside buildings conveying water for human consumption - Part 2: Design

Relations

• Revised: prEN 806-2 - Specification for installations inside buildings conveying water intended for human consumption - Part 2: Design
• Effective Date: 30-Aug-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2005
6SHFLILNDFLMH]DQDSHOMDYH]DSLWQRYRGRYVWDYEDKGHO1DþUWRYDQMH
Specification for installations inside buildings conveying water for human consumption -
Part 2: Design
Technische Regeln für Trinkwasser-Installationen - Teil 2: Planung
Spécifications techniques relatives aux installations d'eau destinée a la consommation
humaine a l'intérieur des bâtiments - Partie 2: Conception
Ta slovenski standard je istoveten z: EN 806-2:2005
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.

EUROPEAN STANDARD
EN 806-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2005
ICS 91.140.60
English version
Specification for installations inside buildings conveying water
for human consumption - Part 2: Design
Spécifications techniques relatives aux installations pour Technische Regeln für Trinkwasser-Installationen - Teil 2:
l'eau destinée à la consommation humaine à l'intérieur des Planung
bâtiments - Partie 2: Conception
This European Standard was approved by CEN on 3 February 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 806-2:2005: E
worldwide for CEN national Members.

Contents
Foreword.3
1 Scope .4
2 Normative references .4
3 General requirements.7
4 Private water supplies.9
5 Acceptable materials.10
6 Components.14
7 Pipework inside buildings .14
8 Cold potable water services .15
9 Hot water systems .17
10 Prevention of bursting .18
11 Guidelines for water meter installations .21
12 Water conditioning .22
13 Acoustics.23
14 Protection of systems against temperatures external to pipes, fittings and appliances.23
15 Boosting .25
16 Pressure reducing valves .30
17 Combined drinking water and fire fighting services.31
18 Prevention of corrosion damage.32
19 Additional requirements for vented cold and hot water systems .33
Annex A (informative)  List of acceptable materials (non-exhaustive).39
Annex B (informative)  Aspects for water conditioning .42
Bibliography .49

Foreword
This document (EN 806-2:2005) has been prepared by Technical Committee CEN/TC 164 “Water supply”, the
secretariat of which is held by AFNOR.
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 September 2005, and conflicting national standards shall be withdrawn at the
latest by September 2005.
This document has been prepared under the direction of CEN/TC 164 and is intended for the use of engineers,
architects, surveyors, contractors, installers, water suppliers, consumers and regulatory inspections.
This standard has been written in the form of a practice specification. It is the second part of a European Standard
consisting of five parts as follows:
 Part 1: General
 Part 2: Design
 Part 3: Pipe sizing
 Part 4: Installation
 Part 5: Operation and maintenance
NOTE : Products intended for use in water supply systems must comply, when existing, with national regulations and testing
arrangements that ensure fitness for contact with drinking water. The Member states relevant regulators and the EC
Commission agreed on the principle of a future unique European Acceptance Scheme (EAS), which would provide a common
testing and approval arrangement at European level. If and when the EAS is adopted, European Product Standards will be
amended by the addition of an Annex Z/EAS under Mandate M136 which will contain formal references to the testing,
certification and product marking requirements of the EAS. Until EAS comes into force, the current national regulations remain
applicable.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark,
Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
1 Scope
This document gives recommendations, and specifies requirements, on the design of potable water installations
within buildings and for pipework outside buildings but within the premises (see EN 806-1) and applies to new
installations, alterations and repairs.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references,
only the edition cited applies. For undated references the latest edition of the referenced document (including any
amendments) applies.
EN 26, Gas-fired instantaneous water heaters for sanitary uses production, fitted with atmospheric burners
(Including Corrigendum 1998).
EN 89, Gas-fired storage water heaters for the production of domestic hot water.
EN 545, Ductile iron, pipes, fittings, accessories and their joints for water pipelines — Requirements and test
methods.
EN 625, Gas-fired central heating boilers — Specific requirements for the domestic hot water operation of
combination boilers of nominal heat input not exceeding 70 kW .
EN 805, Water supply — Requirements for external systems and components outside buildings.
EN 806-1:2000, Specifications for installations inside buildings conveying water for human consumption —
Part 1: General.
prEN 806-3, Specifications for installations inside buildings conveying water for human consumption — Part 3: Pipe
sizing.
EN 973, Chemicals used for treatment of water intended for human consumption – Sodium chloride for
regeneration of ion exchangers.
EN 1057, Copper and copper alloys – Seamless, round copper tubes for water and gas in sanitary and heating
applications.
EN 1254-1, Copper and copper alloys – Plumbing fittings – Part 1: Fittings with ends for capillary soldering or
capillary brazing to copper tubes.
EN 1254-2, Copper and copper alloys – Plumbing fittings – Part 2: Fittings with compression ends for use with
copper tubes.
EN 1254-3, Copper and copper alloys – Plumbing fittings – Part 3: Fittings with compression ends for use with
plastics pipes.
EN 1254-4, Copper and copper alloys - Plumbing fittings - Part 4: Fittings combining other end connections with
capillary or compression ends
EN 1254-5, Copper and copper alloys – Plumbing fittings – Part 5: Fittings with short ends for capillary brazing to
copper tubes.
prEN 1254-7, Copper and copper alloys - Plumbing fittings - Part 7: Fittings with press ends for metallic tubes
EN 1452-1, Plastics piping systems for water supply — Unplasticized poly(vinyl chloride) (PVC-U) —
Part 1: General.
EN 1452-2, Plastics piping systems for water supply — Unplasticized poly(vinyl chloride) (PVC-U) — Part 2: Pipes.
EN 1452-3, Plastics piping systems for water supply — Unplasticized poly(vinyl chloride) (PVC-U) —
Part 3 : Fittings.
EN 1452-5, Plastics piping systems for water supply — Unplasticized poly(vinyl chloride) (PVC-U) — Part 5:
Fitness for purpose of the system.
ENV 1452-7, Plastics piping systems for water supply — Unplasticized poly(vinyl chloride) (PVC-U) –
Part 7: Guidance for the assessment of conformity.
EN 1487, Building valves – Hydraulic safety groups –Tests and requirements.
EN 1488, Building valves – Expansion group – Tests and requirements.
EN 1489, Building valves – Pressure safety valves – Tests and requirements.
EN 1490, Building valves - Combined temperature and pressure relief valves - Tests and requirements.
EN 1491, Building valves – Expansion valve – Tests and requirements.
EN 1717, Protection against pollution of potable water in water installations and general requirements of devices to
prevent pollution by backflow.
EN 10226-1, Pipe threads where pressure tight joints are made on the threads - Part 1: Taper external threads and
parallel internal threads - Dimensions, tolerances and designation.
EN 10240, Internal and/or external protective coatings for steel tubes – Specification for hot dip galvanized
coatings applied in automatic plants.
EN 10242, Threaded pipe fitting in malleable cast iron.
EN 10255, Non-Alloy steel tubes suitable for welding and threading – Technical delivery conditions.
EN 10284, Malleable cast iron fittings with compression ends for polyethylene (PE) piping systems.
EN 12201-1, Plastics piping systems for water supply – Polyethylene (PE) – Part 1: General
EN 12201-2, Plastics piping systems for water supply – Polyethylene (PE) – Part 2: Pipes
EN 12201-3, Plastics piping systems for water supply – Polyethylene (PE) – Part 3: Fittings.
EN 12201-5, Plastics piping systems for water supply – Polyethylene (PE) – Part 5: Fitness for purpose of the
system.
CEN/TS 12201-7, Plastics piping systems for water supply – Polyethylene (PE) – Part 7: Guidance for the
assessment of conformity.
EN 12502-1, Protection of metallic materials against corrosion – Guidance on the assessment of corrosion
likelihood in water distribution and storage systems – Part 1: General.
EN 12502-2, Protection of metallic materials against corrosion – Guidance on the assessment of corrosion
likelihood in water distribution and storage systems – Part 2: Influencing factors for copper and copper alloys.
EN 12502-3, Protection of metallic materials against corrosion – Guidance on the assessment of corrosion
likelihood in water distribution and storage systems – Part 3: Influencing factors for hot dip galvanised ferrous
materials.
prEN 12502-4, Protection of metallic materials against corrosion – Guidance on the assessment of corrosion
likelihood in water distribution and storage conveying systems – Part 4: Influencing factors for stainless steels.
EN 12502-5, Protection of metallic materials against corrosion – Guidance on the assessment of corrosion
likelihood in water distribution and storage systems – Part 5: Influencing factors for cast iron, unalloyed and low
alloyed steels.
EN 12842, Ductile iron fittings for PVC-U or PE piping systems – Requirements and test methods.
EN 13443-1, Water conditioning equipment inside buildings - Mechanical filters - Part 1: Particle rating 80 µm to
150 µm - Requirements for performances, safety and testing.
EN 14095, Water conditioning equipment inside buildings - Electrolytic treatment systems
...