The most common form of the water coolers are wall mounted and connected to the building’s water supply for a continuous supply of water and electricity to run a refrigeration unit to cool the incoming water, and to the building’s waste disposal system to dispose of unused water. Some versions are freestanding floor models, which are becoming more popular in countries where it is not common to drink water straight from the tap.
Traditional water fountains
In the standard wall-mounted water coolers, also commonly referred to as a water fountain or drinking fountain or in Wisconsin, a bubbler, a small tank in the machine holds chilled water so the user does not have to wait for chilled water. Water is delivered by turning or pressing a button on a spring-loaded valve located on the top of the unit, that turns off the water when released. Some devices also offer a large button on the front or side. Water is delivered in a stream that arches up allowing the user to drink directly from the top of the stream of water. These devices usually dispense water directly from the municipal water supply, without treatment or filtering.
Agree with the author. The above mentioned is really an issue.