FprEN 13077

Devices to prevent pollution by backflow of potable water - Air gap with non-circular overflow (unrestricted) - Family A - Type B

This document specifies the characteristics and the requirements of air gap with non-circular overflow (unrestricted) Family A, Type B for nominal flow velocity not exceeding 3 m/s. Air gaps are devices for protection of potable water in water installations from pollution by backflow. This document applies to air gaps in factory-assembled products and to constructed air gaps in situ and specifies requirements and methods to verify and ensure compliance with this document during normal working use.
The fluid in the receiving vessel is assumed to have similar properties to the water supply. Where this is not the case, additional care or tests could be required to verify the efficacy of the solution in practical use.
The AB device is intended to be used in potable water installations according to EN 806.

Sicherungseinrichtungen zum Schutz des Trinkwassers gegen Verschmutzung durch Rückfließen - Freier Auslauf mit nicht kreisförmigem Überlauf (uneingeschränkt) - Familie A - Typ B

Dieses Dokument legt die Eigenschaften und Anforderungen für freie Ausläufe mit nicht kreisförmigem Überlauf (uneingeschränkt), Familie A, Typ B, für Nenn-Fließgeschwindigkeiten bis 3 m/s fest. Freie Ausläufe sind Sicherungseinrichtungen zum Schutz des Trinkwassers vor Verunreinigungen durch Rückfließen in Trinkwasser-Installationen. Dieses Dokument gilt für freie Ausläufe von werkseitig hergestellten Bauteilen sowie für vor Ort gebaute freie Ausläufe und legt Anforderungen und Verfahren fest, um im normalen Betrieb eine Übereinstimmung mit diesem Dokument zu überprüfen und sicherzustellen.
Es wird angenommen, dass die Flüssigkeit in dem zu versorgenden Behälter ähnliche Eigenschaften wie die Wasserversorgung aufweist. Ist dies nicht der Fall, könnten besondere Sorgfalt oder zusätzliche Prüfungen erforderlich sein, um die Wirksamkeit der Lösung im praktischen Einsatz sicherzustellen.
Die AB Einrichtung ist für die Verwendung in Trinkwasser-Installationen nach EN 806 bestimmt.

Dispositifs de protection contre la pollution de l’eau potable par retour - Surverse avec trop-plein non-circulaire (totale) - Famille A - Type B

Ce document spécifie les caractéristiques et les exigences relatives aux surverses avec trop-plein non circulaire (totale) de la Famille A, Type B, pour des débits nominaux n’excédant pas 3 m/s. Les surverses sont des dispositifs destinés à protéger l’eau potable des installations d’eau contre la pollution par retour. Ce document s’applique à la fois aux surverses faisant partie de produits assemblés en usine et à celles réalisées sur site. Il spécifie les exigences et les méthodes permettant de vérifier et d’assurer la conformité au présent document dans des conditions de service normal.
Le fluide dans le réceptacle est supposé posséder des propriétés similaires à celui du système de distribution d’eau. Lorsque ce n’est pas le cas, il peut se révéler nécessaire de redoubler d’attention ou de mener des essais supplémentaires afin de vérifier l’efficacité de la solution en pratique.
Le dispositif AB est destiné à être utilisé dans des installations d’eau potable conformément à l’EN 806.

Naprave za varovanje pred onesnaženjem pitne vode zaradi povratnega toka - Prosti iztok s prelivom nekrožne oblike (neoviran) - Družina A - Tip B

General Information

• Status: Not Published
• Publication Date: 29-Sep-2023
• ICS: 13.060.20 - Drinking water
• Technical Committee: CEN/TC 164 - Water supply
• Drafting Committee: CEN/TC 164/WG 14 - Valves and fitting for buildings and devices to prevent pollution by backflow
• Current Stage: 6055 - CEN Ratification completed (DOR) - Publishing
• Start Date: 23-Jan-2023
• Due Date: 06-Mar-2022
• Completion Date: 23-Jan-2023
• Ref Project: kSIST FprEN 13077:2022 - Devices to prevent pollution by backflow of potable water - Air gap with non-circular overflow (unrestricted) - Family A - Type B

Relations

• Revises: EN 13077:2018 - Devices to prevent pollution by backflow of potable water - Air gap with non-circular overflow (unrestricted) - Family A - Type B
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 13077:2022
01-januar-2022
Naprave za varovanje pred onesnaženjem pitne vode zaradi povratnega toka -
Prosti iztok s prelivom nekrožne oblike (neoviran) - Družina A - Tip B

Devices to prevent pollution by backflow of potable water - Air gap with non-circular

overflow (unrestricted) - Family A - Type B
Sicherungseinrichtungen zum Schutz des Trinkwassers gegen Verschmutzung durch

Rückfließen - Freier Auslauf mit nicht kreisförmigem Überlauf (uneingeschränkt) -

Familie A - Typ B

Dispositifs de protection contre la pollution de l'eau potable par retour - Surverse avec

trop-plein non circulaire (totale) - Famille A, type B
Ta slovenski standard je istoveten z: prEN 13077
ICS:
13.060.20 Pitna voda Drinking water
23.060.99 Drugi ventili Other valves
91.140.60 Sistemi za oskrbo z vodo Water supply systems
oSIST prEN 13077:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 13077:2022
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oSIST prEN 13077:2022
DRAFT
EUROPEAN STANDARD
prEN 13077
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2021
ICS 13.060.20 Will supersede EN 13077:2018
English Version
Devices to prevent pollution by backflow of potable water
- Air gap with non-circular overflow (unrestricted) -
Family A - Type B

Dispositifs de protection contre la pollution de l'eau Sicherungseinrichtungen zum Schutz des Trinkwassers

potable par retour - Surverse avec trop-plein non gegen Verschmutzung durch Rückfließen - Freier

circulaire (totale) - Famille A, type B Auslauf mit nicht kreisförmigem Überlauf
(uneingeschränkt) - Familie A - Typ B

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

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 13077:2021 E

worldwide for CEN national Members.
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oSIST prEN 13077:2022
prEN 13077:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Introduction .................................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 5

4 Designation........................................................................................................................................................ 6

5 Symbolization ................................................................................................................................................... 6

6 Materials ............................................................................................................................................................. 7

7 Requirements ................................................................................................................................................... 7

7.1 General ................................................................................................................................................................ 7

7.2 Characteristics and tests .............................................................................................................................. 7

7.2.1 General ................................................................................................................................................................ 7

7.3 General tolerances and measurements .................................................................................................. 7

7.3.1 Tolerance of set parameters in the absence of any particular specifications: ......................... 7

7.3.2 Accuracy of measuring instruments ........................................................................................................ 7

7.3.3 Measurements .................................................................................................................................................. 7

7.3.4 Requirement ..................................................................................................................................................... 8

7.4 Water inlet device ........................................................................................................................................... 8

7.5 Overflow arrangements ................................................................................................................................ 9

7.6 Air gap distance A......................................................................................................................................... 11

7.6.1 General ............................................................................................................................................................. 11

7.6.2 Single supply .................................................................................................................................................. 11

7.6.3 Multiple supplies .......................................................................................................................................... 12

7.6.4 Backflow/back pressure ........................................................................................................................... 13

7.7 Verification ..................................................................................................................................................... 13

7.7.1 Procedure for verification by test .......................................................................................................... 13

7.7.2 Procedures for verification by calculation ......................................................................................... 14

8 Marking (not required for products constructed on-site) ............................................................ 14

9 Technical documents .................................................................................................................................. 15

Annex A (informative) Relationship between h and l for air gap Family A, Type B with

rectangular overflow .................................................................................................................................. 16

Annex B (normative) Vacuum Test ..................................................................................................................... 17

B.1 Apparatus ........................................................................................................................................................ 17

B.2 Procedure........................................................................................................................................................ 17

B.3 Requirement .................................................................................................................................................. 18

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oSIST prEN 13077:2022
prEN 13077:2021 (E)
European foreword

This document (prEN 13077:2021) has been prepared by Technical Committee CEN/TC 164 “Water

supply”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 13077:2018.
In comparison with the previous edition, the following changes have been made:
a) Terms and definitions have been amended;
b) Figure 1, Figure 4 and Figure 5 were updated and redrawn;
c) Figure 6 was added as an additional overflow arrangement;
d) the dimension D has been redefined;
e) 7.5 has been revised;
g) Annex B has been deleted;
h) the entire standard has been revised editorially.
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oSIST prEN 13077:2022
prEN 13077:2021 (E)
Introduction

In respect of potential adverse effects on the quality of water intended for human consumption, caused

by the product covered by this document:

a) this document provides no information as to whether the product may be used without restriction

in any of the Member State of the EU or EFTA;

b) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national

regulations concerning the use and/or the characteristics of this product remain in force.

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oSIST prEN 13077:2022
prEN 13077:2021 (E)
1 Scope

This document specifies the characteristics and the requirements of air gap with non-circular overflow

(unrestricted) Family A, Type B for nominal flow velocity not exceeding 3 m/s. Air gaps are devices for

protection of potable water in water installations from pollution by backflow. This document applies to

air gaps in factory-assembled products and to constructed air gaps in situ and defines requirements and

methods to verify and ensure compliance with this document during normal working use.

The fluid in the receiving vessel is assumed to have similar properties to the water supply. Where this is

not the case, additional care or tests could be required to verify the efficacy of the solution in practical

use.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 806-1, Specifications for installations inside buildings conveying water for human consumption - Part 1:

General

EN 806-5, Specifications for installations inside buildings conveying water for human consumption - Part 5:

Operation and maintenance

EN 1717, Protection against pollution of potable water in water installations and general requirements of

devices to prevent pollution by backflow
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 806-1 and EN 1717 and the

following apply.
3.1

air gap with non-circular overflow (unrestricted) Family A, Type B (“AB” air gap)

permanent and vertical distance between the lowest point of the inlet orifice and the critical water level

of the receiving vessel having an overflow which is non-circular in design
Note 1 to entry: See Figure 1 for the design principle.
a) Air gap with non-circular overflow b) Internal non-circular overflow
arrangement
Figure 1 — Design principle
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oSIST prEN 13077:2022
prEN 13077:2021 (E)
3.2
spillover level

level at which water will start to overflow the receiving vessel with all outlets closed

3.3
critical water level

physical or piezometric level of the liquid reached in any part of the appliance 2 s after closing the water

inlet starting from maximum level
3.4
dimension h
height between the spillover level and the critical level

Note 1 to entry: See 7.6 for measurement and calculation. For example, see Annex A.

3.5
maximum level

highest water level H reached above the spillover level with flow rate Q applied and all outlets closed

3.6
diameter of feed pipe outlet orifice (bore D)

internal diameter size of the outlet feed orifice (or calculated from the equivalent cross sectional area)

3.7
unrestricted

during fault condition the water pathway to the overflow (of the receiving vessel) is not compromised

including through the overflow itself
4 Designation

An air gap with non-circular overflow (unrestricted) Family A, Type B is designated by:

— name;
— reference to this document, prEN 13077;
— family and type;
— maximum permitted flow rate.
EXAMPLE Air gap, prEN 13077, Family A, Type B, 14 l/min.
5 Symbolization

The graphic representation of the air gap with non-circular overflow (unrestricted) Family A, Type B is

as follows (see Figure 2).
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oSIST prEN 13077:2022
prEN 13077:2021 (E)
Figure 2 — Graphic symbol
6 Materials

All materials coming into contact with water intended for human consumption shall present no health

risk nor cause any change of the drinking water in terms of quality, appearances, smell or taste. All

materials shall be compatible among themselves and with the water supplied and with the fluids or

substances that can come into contact with them.

There are no special requirements concerning the materials downstream of the feed orifice provided they

do not have any harmful effect on the upstream part or the overflow arrangement.
7 Requirements
7.1 General
The protection assembly comprises three parts:
— water inlet device;
— receiving vessel (container);
— non-circular overflow.
7.2 Characteristics and tests
7.2.1 General

Performance tests shall be carried out on the device as installed in accordance with the manufacturer’s

technical documents, subject to dimension h being complied with. If not specified, all tests shall be

performed with water at an ambient temperature.
7.3 General tolerances and measurements

7.3.1 Tolerance of set parameters in the absence of any particular specifications:

— flow rate and pressure: ± 2 % of the value specified;
— temperature: cold water: ± 5 °C of the value specified;
other values: ± 2 °C of the value specified.
7.3.2 Accuracy of measuring instruments

All the measuring instruments shall have an error limit of ± 2 % of the measured value.

7.3.3 Measurements
All measurements shall be in mm or l/m unless otherwise specified.
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7.3.4 Requirement

All the constituent parts of the arrangement, and in particular those made of elastomer, shall be

compatible with the treated water used for the shock disinfection of the networks using sodium

hypochlorite, hydrogen peroxide, chlorine dioxide or thermal disinfection.
7.4 Water inlet device

Every float-operated valve or other device, which controls the inflow of water to a receiving vessel, shall

be securely and rigidly fixed to the vessel.
Every feed pipe supplying water to such a valve assembly or other
...