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.