SIST EN 61770:2009/A13:2026

Electric appliances connected to the water mains - Avoidance of backsiphonage and failure of hose-sets

The standard specifies requirements for appliances for household and similar purposes to prevent the backflow of non-potable water into the water mains. It also specifies requirements for hose sets used for connecting such appliances to the water mains that supply water at a pressure not exceeding 1 MPa.

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

Električne naprave, priključene na vodovod - Preprečevanje povratnega vodnega udara in odpovedi cevnega sestava - Dopolnilo A13

Standard določa zahteve za naprave za gospodinjske in podobne namene, da se prepreči povratni tok nepitne vode v vodovodno omrežje. Prav tako določa zahteve za cevne komplete, ki se uporabljajo za priključitev takšnih naprav na vodovodno omrežje, ki oskrbuje z vodo pri tlaku, ki ne presega 1 MPa.

General Information

• Status: Published
• Public Enquiry End Date: 18-Dec-2025
• Publication Date: 30-Mar-2026
• ICS: 91.140.60 - Water supply systems
• ICS: 97.030 - Domestic electrical appliances in general
• Technical Committee: VGA - Safety of household and similar electrical appliances
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 20-Mar-2026
• Due Date: 25-May-2026
• Completion Date: 31-Mar-2026
• Ref Project: EN 61770:2009/A13:2026 - Electric appliances connected to the water mains - Avoidance of backsiphonage and failure of hose-sets

Relations

• Amends: SIST EN 61770:2009 - Electric appliances connected to the water mains - Avoidance of backsiphonage and failure of hose sets
• Effective Date: 01-May-2026

Overview

SIST EN 61770:2009/A13:2026 is a European standard developed by CLC (CENELEC) focusing on the safety requirements for electric appliances connected to the water mains, specifically addressing the avoidance of backsiphonage and failure of hose-sets. This standard ensures that household and similar electrical appliances do not unintentionally allow non-potable water to flow back into the water supply, safeguarding water quality and public health. With growing attention to water supply system integrity and appliance reliability, this standard provides a framework to minimize contamination risks associated with electric appliances and their connection hoses, under a maximum operating pressure of 1 MPa.

Key Topics

• Backsiphonage Prevention: Outlines methods and technical specifications to avert backflow that might pull contaminated water into the drinking water supply network.
• Hose-Set Performance: Details requirements for hose sets connecting appliances to water mains, ensuring durability and pressure resistance, reducing the risk of leakage or hose failure.
• Device Installation Guidance: Stresses the importance of clear installation instructions, including the correct selection and use of backflow prevention devices.
• Air Gap Specifications: Prescribes how to calculate and evaluate air gaps at upstream water feed points, which is a fundamental method for preventing backsiphonage.
• Pipe Interrupters: Specifies requirements for the use, positioning, and functional aspects of pipe interrupters as a mechanical means to stop backflow.
• Limitations and exclusions: Clarifies that the scope does not extend to appliances for medical purposes, except those covered by the EN IEC 61010 series.

Applications

SIST EN 61770:2009/A13:2026 applies to a diversity of household and similar electric appliances, particularly those that require a direct connection to the potable water supply such as:

• Washing machines and dishwashers: Ensures these common appliances do not pose a risk of contaminating water mains through faulty hoses or backsiphonage.
• Coffee machines, water dispensers, and similar appliances: Protects end users from inadvertent water quality issues arising from appliance malfunctions or misconnected hoses.
• Professional appliances for non-medical use: Applies to similar appliances used in commercial and public settings where safeguarding water supply is critical.

By implementing this standard, manufacturers enhance appliance compliance, market acceptance, and contribute to the overall safety of water supply systems.

Related Standards

SIST EN 61770:2009/A13:2026 aligns closely with various other European and international standards, including:

• EN 61770:2009 - The core standard for electric appliances connected to water mains, with amendments and corrections.
• EN IEC 61010 series - Relevant for appliances used in medical environments, providing specific safety requirements for medical electrical devices.
• Standards referenced by CEN/TC 164 - Covering water supply system integrity and hygiene.
• National implementations and harmonized standards - Requirements may be further nuanced in national standards or implementations across Europe.

Practical Value

Applying SIST EN 61770:2009/A13:2026 ensures electric appliances connected to water mains in homes, offices, and public buildings are safe, reliable, and do not jeopardize potable water quality. By aligning with this standard, manufacturers and installers demonstrate their commitment to compliance, public safety, and the robust performance of products in the water supply chain, supporting regulatory acceptance across Europe.

Keywords: backsiphonage prevention, electric appliances, hose-sets, water mains, CENELEC, water supply systems, appliance safety, EN 61770, air gap specifications, pipe interrupters, household appliances standards.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2026
Električne naprave, priključene na vodovod - Preprečevanje povratnega vodnega
udara in odpovedi cevnega sestava - Dopolnilo A13
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/A13:2026
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/A13

NORME EUROPÉENNE
EUROPÄISCHE NORM March 2026
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 A13 modifies the European Standard EN 61770:2009; it was approved by CENELEC on 2026-01-13. 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,
Türkiye 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
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61770:2009/A13:2026 E

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