# The Water Supply (Water Fittings) Regulations 1999, Paragraph 31


Every pond, fountain or pool shall have an impervious lining or membrane to prevent the leakage or seepage of water.

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Source: https://www.legislation.gov.uk/uksi/1999/1148/schedule/2/paragraph/31 (the official version)
Page: https://openlegislation.uk/water-supply-water-fittings-regulations-1999/schedule-2/paragraph-31
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.