drain means (subject to Section 219(2) of the 1991 Act) a drain used for the drainage of one building or any buildings or yards appurtenant to buildings within the same curtilage;
Drainage means the removal of surface water or groundwater
Tunnelling means the construction of any tunnel beneath the natural surface of the earth for a purpose other than the searching for or winning of a mineral
Toileting means getting to and from the toilet, getting on and off the toilet, and performing associated personal hygiene.
Valve means a device used to control the flow of water in the irrigation system.