Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Object Groupings and Systems (hierarchy name)
4. systems (equipment)
5. [systems by function]

Additional parents:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment
4. Single Built Works
5. single built works
6. single built works by specific type
7. single built works by function
8. hydraulic structures
9. hydraulic structures by function
10. water distribution structures

Anotations

Scope note:

The system of buildings, hydraulic structures, machinery, and other equipment by which a water supply is obtained, conveyed, and distributed to consumers in cities, towns, or neighborhoods.