【正文】 ION C O M I T 201。E N D E NOR M A L I S A T I ON EUR O P 196。 R NOR M UNG Management Centre: rue de Stassart, 36 B1050 Brussels 169。 BSI 012020 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 10:39:47 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Contents Page Foreword............................................................................................................................ 3 Introduction ....................................................................................................................... 3 1 Scope ...................................................................................................................... 4 2 Normative references............................................................................................. 4 3 Terms and definitions ............................................................................................ 4 4 Pollution of potable water: general observations ............................................... 6 Backflow of used water.......................................................................................... 6 Connection.............................................................................................................. 6 External influences ................................................................................................ 7 Materials.................................................................................................................. 7 Stagnation ............................................................................................................... 7 Harm caused by inadequate or improper maintenance ...................................... 7 5 Analysis method of the risks at the point of use and choice of protection ...... 7 General remarks ..................................................................................................... 7 Determination of fluid categories which are or could be in contact with potable water .......................................................................................................... 8 Determination of the installation characteristics ................................................ 9 Separation by single or double walls ................................................................... 9 Air break to drain...................................................................................................10 Installation matrix..................................................................................................10 Protection units .....................................................................................................10 Matrix of the protection units appropriate to fluid categories...........................12 6 Point of use protection for equipment at the drawoff point for domestic uses ........................................................................................................................14 Choice of the protection units to be implemented .............................................14 Location of the protection units...........................................................................14 7 Point of use protection of particular equipment for non domestic uses..........14 8 Protection at the connection point to the public potable water system ...........14 9 Air break to drain...................................................................................................15 Annex A (normative) Reference list of the protection units ........................................16 Annex B (informative) Guide table for determining the fluid category from which protection is required ...........................................................................................47 Annex C (informative) Summary of the analysis method..............................................49 Bibliography .....................................................................................................................50 Page 3 EN 1717:2020 169。 2) it should be noted that, while awaiting the adoption of verifiable European criteria, existing national regulations concerning the use and/or the characteristics of these products remain in force. Page 4 EN 1717:2020 169。 BSI 012020 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue May 08 10:39:47 GMT+00:00 2007, Uncontrolled Copy, (c) BSI disconnection break in a hydraulic circuit creating an atmospheric area between two elements, one carrying or containing potable water (upstream) and another carrying or containing another fluid (downstream) domestic use any use related to residential or similar dwellings ? normal use for dwellings and homes, as well as hotels, schools and offices, munal residences, etc. (for example kitchen sink, wash and hand basin, bath, shower, WC, production of hot water for sanitary purposes, domestic washing machine and dishwasher, bidet, watering of garden)。 ? in industrial and mercial premises “domestic use” is limited to water used for those applications/appliances described under normal use in dwelling and homes (for example exc ludes water used for process, fire fighting, central heating or irrigation systems). downstream the side to which fluid flows under normal conditions potable water system water system located downstream of the delivery point specified by the water supply authorities or regulations family of protection general identification of a