7.—(1) No water fitting shall be embedded in any wall or solid floor.
(2) No fitting which is designed to be operated or maintained, whether manually or electronically, or which consists of a joint, shall be a concealed water fitting.
(3) Any concealed water fitting or mechanical backflow prevention device, not being a terminal fitting, shall be made of gunmetal, or another material resistant to dezincification.
(4) Any water fitting laid below ground level shall have a depth of cover sufficient to prevent water freezing in the fitting.
(5) In this paragraph “concealed water fitting” means a water fitting which–
(a)is installed below ground;
(b)passes through or under any wall, footing or foundation;
(c)is enclosed in any chase or duct; or
(d)is in any other position which is inaccessible or renders access difficult.