| 摘要 |
A water supply system comprises piping (15) from an underground mains supply (16) to a building (10) characterised in that the piping (15A) emerges from underground adjacent the building (10), is attached to and runs up a wall (13) of the building (10) and enters the building (10) above ground level to connect into the water supply infrastructure (20,21) inside the building (10). Piping, suitable for use with the above water supply system, comprises an inner pipe (24), an intermediate layer of thermal insulation (25) and an outer tube (26). |
