EN 61770:2009/A12:2022

SLOVENSKI STANDARD
01-september-2022
Električne naprave, priključene na vodovod - Preprečevanje povratnega vodnega
udara in odpovedi cevnega sestava - Dopolnilo A12
Electric appliances connected to the water mains - Avoidance of backsiphonage and
failure of hose-sets
Elektrische Geräte zum Anschluss an die Wasserversorgungsanlage - Vermeidung von
Rücksaugung und des Versagens von Schlauchsätzen
Appareils électriques raccordés au réseau d'alimentation en eau - Exigences pour éviter
le retour d'eau par siphonnage et la défaillance des ensembles de raccordement
Ta slovenski standard je istoveten z: EN 61770:2009/A12:2022
ICS:
91.140.60 Sistemi za oskrbo z vodo Water supply systems
97.030 Električni aparati za dom na Domestic electrical
splošno appliances in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61770:2009/A12

NORME EUROPÉENNE
EUROPÄISCHE NORM June 2022
ICS 91.140.60; 97.030
English Version
Electric appliances connected to the water mains - Avoidance of
backsiphonage and failure of hose-sets
Appareils électriques raccordés au réseau d'alimentation en Elektrische Geräte zum Anschluss an die
eau - Exigences pour éviter le retour d'eau par siphonnage Wasserversorgungsanlage - Vermeidung von Rücksaugung
et la défaillance des ensembles de raccordement und des Versagens von Schlauchsätzen
This amendment A12 modifies the European Standard EN 61770:2009; it was approved by CENELEC on 2021-11-15. CENELEC members
are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment 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 CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61770:2009/A12:2022 E

European foreword
This document (EN 61770:2009/A12:2022) has been prepared by CLC/TC 61 “Safety of household and similar
electrical appliances” in collaboration with CEN/TC 164 “water supply”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2022-12-10
implemented at national level by publication of an
identical national standard or by endorsement
• latest date by which the national standards conflicting (dow) 2025-06-10
with this document have to be withdrawn

This document has been prepared under a mandate given to CENELEC by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A complete
listing of these bodies can be found on the CENELEC website.

Text of A12:2021 of EN 61770:2009
1 Modification to Introduction
This European Amendment A12 supplements or modifies the corresponding clauses of
EN 61770:2009+A11:2018+A1:2019
2 Modification to clause “3 Terms and definitions”
3.4 airgaps
3.4.Z1 airgap (general)
Add the following note at the end of the clause:
NOTE 1 to entry: a distance is considered to be unobstructed if the air flow into the feed pipe under vacuum conditions is not
restricted by the construction of the appliance.
3.Z6 diameter of feed pipe (bore D)
Replace the definition of diameter of feed pipe with the following:
Internal diameter size of the outlet feed orifice (or calculated from the equivalent cross sectional area)
NOTE 1 to entry: The dimension of the diameter “D” is in mm
Add Note 2 to entry.
NOTE 2 to entry: If a water valve is used for calculations, then the internal diameter of the outlet connection is used or the
minimum feed orifice diameter, whichever is smaller.
Add new definition:
3.Z9 Connection arrangement
All components in contact with water, located between the water tap and the backflow-prevention device and
according 4.2 incorporated in or fixed to the electrical appliance
NOTE 1 to entry: Hose-sets and inlet-valves are typical components of the connection arrangement.
NOTE 2 to entry: For further information, see Figure Z22 – connection arrangement.
3 Modification to clause “4 General requirements”
4.Z1
Modify “NOTE” with “NOTE Z1”
Add the following sentence:
If components of the connection arrangement are not suitable for contact with water intended for human
consumption, but risk analysis does not show specific hazards and if the total volume of water in contact with
those components is equal or less than 1 l, they shall be considered as risk category 2 and be protected against
backflow and backsiphonage accordingly.
NOTE Z2: The backflow prevention device is installed before the first component downstream of the connection
arrangement that is not suitable for water intended for human consumption.

4 Modification to clause “6 Air gaps”
Modify the subclauses as follow:
6.Z2 Overflow arrangements
Add the following text at the end of the clause:
The air break to drain shall not obstruct the overflow.
An overflow is to be regarded as unobstructed if during the investigation of the assembly in each possible
functional position the critical water level h is not increased.
6.Z2.1 AB air gaps overflow
Add the following text after the first paragraph:
The overflow arrangements at the receivi
...