CEI EN 61770/A11 PDF

This European 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.

NOTE 1 Examples of similar purposes are the installation of appliances in canteens, restaurants, launderettes and communal flats.

NOTE 2 The connection of the appliance to the water mains may be temporary or permanent.

NOTE 3 When reference is made to the water mains, water supplied from a cistern or similar system is also included.

This standard does not apply to

a) appliances used for dry cleaning;

b) appliances for medical purposes;

c) appliances intended for industrial purposes;

d) water heaters that are an integral part of the water supply system;

e) water coolers that are an integral part of the water supply system;

f) backflow prevention devices for general purposes.