The Astral Pool Air Blower is designed for spas, baths, hydromassage installations and similar which produces a constant stream of air bubbles at medium and high air volume levels. They can also be used to stir up the filter bed, for example in back wash cycles where a low intensity air current is required. The filter casing and impellor are made from an injected aluminium alloy whilst the spindle is made from stainless steel with the impeller dynamically balanced and directly adapted to the spindle. The motors single phase or 3 phase for continuous use, are made from steel. The turbines have a maximum working temperature of 40oC.