Bottled water coolers typically use 5 or 10-gallon dispensers commonly found on top of the unit. Pressure coolers are a subcategory of water coolers encompassing water fountains and direct-piping water dispensers.Water cooler may also refer to a primitive device for keeping water cool.

Inside the water cooler is a valve that prevents the water from the bottle flooding thewater cooler. The water inside the water cooler is fed into a reservoir, where it is cooled using a refrigerant. … The cooled gas in the water pipe is forced through a valve to make it even colder.

Water coolers need to be sanitised every three to six months. … The outside areas of the water cooler and its drip tray should be cleaned on a regular basis. Bottles should not be filled with water from a tap or any other source. You should keep your bottles stored in a cool, clean and dark environment.