Replacement: 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.