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]
6. plumbing systems
7. water distribution systems

Anotations

Scope note:

Water distribution systems in which water is pumped to holding tanks above the points of use, thereby increasing water pressure through gravity; most often employed in tall buildings where municipal water supply lacks the pressure necessary for an upfeed system.