SIST EN 61770:2009/A13:2026
(Amendment)Electric appliances connected to the water mains - Avoidance of backsiphonage and failure of hose-sets
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
- 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
Relations
- Effective Date
- 01-May-2026
Overview
EN 61770:2009/prAC:2025 (CLC) is a draft amendment to the European standard EN 61770:2009 that specifies requirements for electric appliances connected to the water mains to prevent the backflow of non‑potable water into the public supply and to reduce the risk of hose‑set failure. The document covers household and similar appliances and associated hose sets used on water mains supplying water at pressures up to 1 MPa. This prAC (2025) was prepared by CLC/TC 61 in collaboration with CEN/TC 164 and is currently submitted for enquiry within CENELEC.
Key topics and technical requirements
- Scope of protection
- Prevention of backsiphonage and backflow from appliances into the water mains.
- Requirements apply to household and similar electrical appliances and connecting hose‑sets (≤ 1 MPa).
- Backflow prevention devices
- Instruction requirements: manuals must give guidance on installation and the type of backflow prevention device to use.
- Note: Certain clause requirements (4.1 and 4.2) do not apply to the backflow prevention device Category 2 shown in Figure Z22 (as referenced in the amendment).
- Air gaps
- Air gap AD calculations must use the upstream feed orifice D (n.3 of Figure Z5).
- If multiple upstream feed orifices exist, each is evaluated as a separate AD air gap.
- Pipe interrupters
- No specific orientation is required for pipe interrupters when applying the standard.
- Clarification: a water diverter valve is not considered a closing element.
- Hose‑set requirements
- Hose sets intended for connecting appliances are covered to reduce failure and consequent contamination risk; intended operating pressure up to 1 MPa.
Applications and users
This standard is practical for:
- Appliance manufacturers (washers, dishwashers, water‑connected appliances) - to design safe inlet connections and provide compliant instructions.
- Hose‑set and component suppliers - to ensure materials and fittings meet the backflow and mechanical integrity expectations.
- Installers and plumbers - for correct selection and installation of backflow prevention measures and hose connections.
- Test laboratories and conformity assessors - for evaluating compliance with EN 61770 requirements.
- Water utilities and regulators - to reference in guidance and national implementation to protect potable water supplies.
Related standards
- EN 61770:2009 and its earlier amendments (AC/A1/A11/…) - this prAC 2025 proposes modifications to that base standard.
- EN IEC 61010 - appliances for medical purposes are excluded from this standard where covered by the EN IEC 61010 series.
- CEN/TC 164 publications on water supply systems (context for backflow prevention).
Keywords: EN 61770, backsiphonage, backflow prevention, hose‑set failure, water mains, household appliances, air gap, pipe interrupter, CENELEC, CLC/TC 61.
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Frequently Asked Questions
SIST EN 61770:2009/A13:2026 is a amendment published by the Slovenian Institute for Standardization (SIST). Its full title is "Electric appliances connected to the water mains - Avoidance of backsiphonage and failure of hose-sets". This standard covers: 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.
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.
SIST EN 61770:2009/A13:2026 is classified under the following ICS (International Classification for Standards) categories: 91.140.60 - Water supply systems; 97.030 - Domestic electrical appliances in general. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 61770:2009/A13:2026 has the following relationships with other standards: It is inter standard links to SIST EN 61770:2009. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 61770:2009/A13:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
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
Contents Page
European foreword .
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