This European Standard specifies: - the dimensional, mechanical, hydraulic and acoustic characteristics with which flow rate regulators should comply; - the procedures for testing these characteristics. This European Standard is applicable to: - flow rate regulators intended to be mounted on tapware used with sanitary appliances in toilets, washrooms and kitchens (single taps, combination tap assemblies, mechanical mixing valves, thermostatic mixing valves); - flow rate regulators used under the following pressure and temperature conditions: Flow rate regulators can only be connected downstream of the obturator of the tap.