Replacement of lead pipesE+W
30.—(1) The relevant supplier must modify or replace its part of a pipe where a relevant supplier—
(a)has received from the owner of premises to which water is so supplied notice in writing—
(i)of the owner's intention to replace so much of the pipe as belongs to him; and
(ii)of his desire that the relevant supplier replaces the remainder of the pipe; and
(b)has reason to believe that water supplied by it for regulation 4(1) purposes from a pipe to which paragraph (2) applies contains, at the consumer's tap, a concentration of lead which exceeds 10 μg/1.
(2) This paragraph applies to a pipe—
(a)of which the major component is lead;
(b)which is subject to water pressure from a water main or would be so subject but for the closing of some valve; and
(c)of which part belongs to a relevant supplier and of which the remainder belongs to the owner of any premises to which the relevant supplier supplies water for regulation 4(1) purposes.