This European Standard specifies requirements for and gives recommendations on the design, installation, alteration, testing, maintenance and operation of potable water installations within buildings and, for certain purposes, pipework outside buildings but within the premises (see Figure 1).
It covers the system of pipes, fittings and connected appliances installed for supplying potable water.
If there is a private drinking water supply within the property boundary, the scope of this standard also covers the pipe system from the point of entry from that private water supply.
The sphere of application ends at the downstream end of the potable water installation at which point must be an air gap, (e. g. at a kitchen tap) or a protection device, (e. g. at a hose union tap).