18.—(1) A person shall not install any installation pipework in any position in which it cannot be used with safety having regard to the position of other pipes, pipe supports, drains, sewers, cables, conduits and electrical apparatus and to any parts of the structure of any premises in which it is installed which might affect its safe use.
(2) Any person who connects any installation pipework to a primary meter shall, in any case where electrical cross-bonding may be necessary, inform the responsible person that such cross-bonding should be carried out by a competent person.