The Gas Safety (Installation and Use) Regulations 1994

Enclosed pipes

19.—(1) No person shall install any part of any installation pipework in a wall or a floor or standing of solid construction unless it is so constructed and installed as to be protected against failure caused by the movement of the wall, the floor or the standing as the case may be.

(2) No person shall install any installation pipework so as to pass through a wall or a floor or standing of solid construction from one side to the other unless any part of the pipe within such wall, floor or standing as the case may be—

(a) takes the shortest practicable route; and

(b) is enclosed in a gastight sleeve and the pipe and the sleeve are so constructed and installed as to prevent, as far as is reasonably practicable having regard to paragraph (1) above, gas passing along any space between the pipe and the sleeve or between the sleeve and such a wall, floor or standing as the case may be.

(3) No person shall install any part of any installation pipework in the cavity of a cavity wall unless the pipe is to pass through the wall from one side to the other.

(4) No person shall install any installation pipework or any service pipework under the foundations of a building or in the ground under the base of a wall or footings unless adequate steps are taken to prevent damage to the installation pipework or service pipework in the event of the movement of those structures or the ground.

(5) Where any installation pipework is not itself contained in a ventilated duct, no person shall install any installation pipework in any shaft, duct or void which is not adequately ventilated.