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The Spirotech Brass SpiroVent Air Separator, 22mm, is a high-performance deaerator designed to remove air from heating and cooling systems. For optimal performance, install it at the hottest point of a heating system, typically where the water exits the boiler. In a cooling system, place it in the return line before the chiller unit. When correctly positioned, the SpiroVent ensures the entire system is free from air, making the water absorptive and improving overall efficiency. It operates under temperatures up to 180C and pressures up to 10 Bar, providing reliable air separation in demanding environments.. Spirotech Brass SpiroVent Air Separator - 22mm AA022/022