A water dispenser effect is a phenomenon, occurring when employees at a workplace gather around the office water dispenser and chat. It is a synonym for gathering and connecting people in a certain environment (e.g. the office). When a television program, like a soap-opera or series, is talked about among many people (mostly related to guessing what will happen in the next episode) it can be said that the program has a water dispenser effect.
To install the bottle, the bottle is tipped upside down and set onto the cooler; a probe punctures the cap of the bottle and allows the water to flow into the machine’s internal reservoir. These gravity-powered systems have a device to dispense water in a controlled manner. These machines come in different sizes and vary from table units, intended for occasional use to floor-mounted units intended for heavier use. Bottled water normally is delivered to the household or business on a regular basis, where empty bottles are exchanged for full ones.
The bottle size varies with the size of the unit, with the larger versions in the US using 5-US-gallon (18.9 L) bottles. This is also the most common size elsewhere, labelled as 18.9 litres in countries that use the metric system. These units usually do not have a place to dump excess water, only offering a small basin to catch minor spills. On the front, a lever or pushbutton dispenses the water into a cup held beneath the spigot. When the water container is empty, it is lifted off the top of the cooler, and automatically seals to prevent any excess water still in the bottle from leaking.
Plumbed water coolers use tap water and therefore do not need bottles. Usually some method of purification is used.
Filtration methods include reverse osmosis, ion exchange and activated carbon
There are also smaller versions of the water coolers where the cooler can be placed directly on top of a table for serving a smaller number of people.
Water coolers can be directly connected to the in-house water source for continuous dispensing of hot and cold drinking water.
A freestanding design generally involves bottles of water placed spout-down into the dispensing machine. Tabletop or kitchen worktop versions are available which utilise readily available five-liter water bottles from supermarkets. These coolers use air pumps to push the water into the cooling chamber and Peltier devices to chill the water. A new development within the water dispenser market is the advent of countertop appliances which are connected to the mains and provide an instant supply of not only chilled water but also boiling hot and hot water.