This International Standard specifies requirements for appliances for household and similar
purposes to prevent the backsiphonage 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.
NOTE 1 Examples of similar purposes are the installation of appliances in canteens, restaurants, launderettes and
communal flats.
NOTE 2 This standard does not apply to
– appliances used for dry cleaning;
– appliances for medical purposes;
– appliances intended for industrial purposes;
– water heaters that are an integral part of the water supply system;
– water coolers that are an integral part of the water supply system.
NOTE 3 The connection of the appliance to the water mains may be temporary or permanent.
NOTE 4 When reference is made to the water mains, water supplied from a cistern or similar system is also
included.
NOTE 5 Many countries have requirements concerning the prevention of contamination of potable water as a
result of contact with unsuitable materials upstream of a safety device.
IEC 61770:2006 history
2015IEC 61770:2008/AMD1:2015 Electric appliances connected to the water mains - Avoidance of backsiphonage and failure of hose-sets; Amendment 1
2015IEC 61770:2015 Electric appliances connected to the water mains - Avoidance of backsiphonage and failure of hose-sets
2008IEC 61770:2008 Electric appliances connected to the water mains - Avoidance of backsiphonage and failure of hose-sets
1970IEC 61770:1998/AMD2:2006 Amendment 2 - Electric appliances connected to the water mains - Avoidance of backsiphonage and failure of hose-sets
2006IEC 61770:2006 Electric appliances connected to the water mains - Avoidance of backsiphonage and failure of hose-sets
1970IEC 61770:1998/AMD1:2004 Amendment 1 - Electric appliances connected to the water mains - Avoidance of backsiphonage and failure of hose-sets
2004IEC 61770:2004 Electric appliances connected to the water mains - Avoidance of backsiphonage and failure of hose-sets
1998IEC 61770:1998 Electric appliances connected to the water mains - Avoidance of backsiphonage and failure of hose-sets