Air separator is designed to separate air from water and eject it from the system. Modern air separators create regions of reduced pressure as water passed through. The lowered pressure causes dissolved gases in the water to form into bubbles. Once formed, these bubbles are guided upward into a collection chamber where an automatic air vent expels them from the system. The process of separating air from water in enhanced as the water is heated. For the best result, the air separator should be located where water temperatures are highest in the supply pipe from the heat source.