S.L. 449.57 Art. 11Quality assurance of treatment, equipment and materials.

The competent authority shall take all measures necessary to ensure that no substances or materials for new installations used in the preparation or distribution of water intended for human consumption or impurities associated with such substances or materials for new installations remain in water intended for human consumption in concentrations higher than is necessary for the purpose of their use and do not, either directly or indirectly, reduce the protection of human health provided for in these regulations; the interpretative document and technical specifications pursuant to Article 3 and Article 4(1) of Council Directive 89/106/EEC of 21 December 1988 on the approximation of laws, regulations and administrative provisions of the Member States relating to construction products shall respect the requirements of these regulations.