# The Water Supply (Water Fittings) Regulations 1999, Paragraph 4


Every water fitting shall–
(a) be watertight;
(b) be so constructed and installed as to–
(i) prevent ingress by contaminants, and
(ii) inhibit damage by freezing or any other cause;
(c) be so installed as to minimise the risk of permeation by, or deterioration from contact with, any substance which may cause contamination; and
(d) be adequately supported.

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Source: https://www.legislation.gov.uk/uksi/1999/1148/schedule/2/paragraph/4 (the official version)
Page: https://openlegislation.uk/water-supply-water-fittings-regulations-1999/schedule-2/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.