EN 16941-1:2018

On-site non-potable water systems - Part 1: Systems for the use of rainwater

This European Standard specifies the requirements and gives recommendations for the design, sizing, installation, identification, commissioning and maintenance of rainwater harvesting systems for the use of rainwater on-site as non-potable water. This European Standard also specifies the minimum requirements for these systems.
Excluded from the scope of this European Standard are:
- the use as drinking water and for food preparation;
- the use for personal hygiene purposes;
- decentralized attenuation;
- infiltration.
NOTE   Conformity with the standard does not exempt from compliance with the obligations arising from local or national regulations.

Vor-Ort-Anlagen für Nicht-Trinkwasser - Teil 1: Anlagen für die Verwendung von Regenwasser

Diese Europäische Norm legt Anforderungen fest und enthält Empfehlungen für Planung, Bemessung, Einbau, Kennzeichnung, Inbetriebnahme und Wartung von Regenwassernutzungsanlagen zur Verwendung von Regenwasser vor Ort. Diese Europäische Norm legt auch die Mindestanforderungen an solche Systeme fest.
Vom Anwendungsbereich dieser Europäischen Norm ausgenommen sind:
   die Verwendung als Trinkwasser und zur Herstellung von Speisen;
   die Verwendung für die Körperhygiene;
   dezentrale Rückhaltung;
   Infiltration.
ANMERKUNG Konformität mit dieser Norm entbindet nicht von der Einhaltung der Auflagen, die sich aus örtlichen oder nationalen Vorschriften ergeben können.

Réseaux d’eau non potable sur site - Partie 1 : Systèmes pour l’utilisation de l’eau de pluie

La présente Norme européenne spécifie les exigences et fournit des recommandations concernant la conception, le dimensionnement, l’installation, l’identification, la mise en service et l’entretien des systèmes de récupération de l’eau de pluie pour son utilisation sur site en tant qu’eau non potable. La présente Norme européenne spécifie également les exigences minimales relatives à ces systèmes.
Sont exclues du domaine d’application de la présente Norme européenne :
-   l’utilisation comme eau potable et pour la préparation des aliments ;
-   l’utilisation pour l’hygiène personnelle ;
-   le stockage et la restitution à débit contrôlé ;
-   l’infiltration.
NOTE   La conformité à la présente norme ne dispense pas de se conformer aux obligations découlant des réglementations nationales ou locales.

Sistemi za vodo, ki ni namenjena pitju, nameščeni na terenu - 1. del: Sistemi za uporabo deževnice

Ta evropski standard določa načrtovanje, ugotavljanje velikosti, namestitev, prepoznavanje, zagon in vzdrževanje sistemov za zbiranje deževnice za njeno uporabo na terenu kot nadomestek za pitno vodo. Standard prav tako določa minimalne zahteve za te sisteme.
Ta standard ne zajema:
– uporabe pitne vode,
– decentraliziranega zmanjševanja odtoka vode,
– infiltracije.
OPOMBA: Skladnost s standardom ne pomeni, da lahko uporabnik opusti ukrepe za izpolnitev zahtev, ki izhajajo iz lokalnih ali nacionalnih predpisov.

General Information

• Status: Withdrawn
• Publication Date: 23-Jan-2018
• Withdrawal Date: 19-Mar-2024
• ICS: 93.025 - External water conveyance systems
• Technical Committee: CEN/TC 165 - Waste water engineering
• Drafting Committee: CEN/TC 165/WG 50 - Use of treated wastewater
• Ref Project: SIST EN 16941-1:2018 - On-site non-potable water systems - Part 1: Systems for the use of rainwater

Relations

• Replaced By: EN 16941-1:2024 - On-site non-potable water systems - Part 1: Systems for the use of rainwater
• Effective Date: 18-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2018
6LVWHPL]DYRGRNLQLQDPHQMHQDSLWMXQDPHãþHQLQDWHUHQXGHO6LVWHPL]D
XSRUDERGHåHYQLFH
On-site non-potable water systems - Part 1: Systems for the use of rainwater
Vor-Ort Anlagen für Nicht-Trinkwasser - Teil 1: Anlagen für die Verwendung von
Regenwasser
Réseaux d’eau non potable sur site - Partie 1 : Systèmes pour l’utilisation de l’eau de
pluie
Ta slovenski standard je istoveten z: EN 16941-1:2018
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 16941-1
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2018
EUROPÄISCHE NORM
ICS 93.025
English Version
On-site non-potable water systems - Part 1: Systems for
the use of rainwater
Réseaux d'eau non potable sur site - Partie 1 : Systèmes Vor-Ort-Anlagen für Nicht-Trinkwasser - Teil 1:
pour l'utilisation de l'eau de pluie Anlagen für die Verwendung von Regenwasser
This European Standard was approved by CEN on 28 August 2017.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 16941-1:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Functional elements of rainwater harvesting systems . 8
5 Design . 8
5.1 Collection . 8
5.1.1 General . 8
5.1.2 Collection surfaces . 9
5.1.3 Collection piping system . 9
5.2 Treatment . 9
5.2.1 General . 9
5.2.2 Preliminary treatment . 10
5.2.3 Additional treatment . 10
5.3 Storage . 10
5.3.1 General . 10
5.3.2 Materials . 11
5.3.3 Dimensions . 11
5.3.4 Capacity. 11
5.3.5 Structural behaviour . 11
5.3.6 Watertightness . 11
5.3.7 Connections and internal pipe system . 11
5.3.8 Access . 12
5.3.9 Overflow . 12
5.4 Back-up water supply . 12
5.4.1 General . 12
5.4.2 Backflow protection device . 13
5.5 Pumping . 14
5.5.1 General . 14
5.5.2 Submerged pump . 15
5.5.3 Non-submerged pump . 15
5.5.4 Expansion vessel . 16
5.5.5 Pump control unit . 16
5.6 System control with monitoring . 16
5.7 Metering . 17
5.8 Distribution . 17
5.9 Risk assessment . 17
6 Sizing . 18
6.1 Storage device . 18
6.1.1 General . 18
6.1.2 Determination of the available volume of rainwater. 19
6.1.3 Determination of the non-potable water demand per day . 20
6.1.4 Calculation methods . 20
6.2 Back-up water supply . 20
7 Installation . 21
8 Differentiation and identification. 21
9 Commissioning . 22
10 Quality of non-potable water . 22
11 Maintenance . 23
Annex A (informative) Examples of calculation methods for storage capacity . 24
A.1 General . 24
A.2 Examples of calculation methods . 24
A.2.1 Basic approach with annual time step . 24
A.2.2 Detailed approach . 25
A.2.2.1 General . 25
A.2.2.2 Input data . 26
A.2.2.3 Simulation principle . 26
A.2.2.4 Application of results . 27
Annex B (informative) Examples of rainwater harvesting systems with different back-up
supply arrangements . 29
Annex C (informative) Example for a commissioning sheet and logbook . 32
C.1 Commissioning sheet . 32
C.2 Logbook . 33
Annex D (informative) Inspection and maintenance . 34
Bibliography . 35

European foreword
This document (EN 16941-1:2018) has been prepared by Technical Committee CEN/TC 165
“Wastewater engineering”, the secretariat of which is held by DIN.
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 July 2018 and conflicting national standards shall be
withdrawn at the latest by July 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
EN 16941, On-site non-potable water systems consists of the following parts:
— Part 1: Systems for the use of rainwater
— Part 2: Systems for the use of greywater (in preparation)
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portuga
...