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The SpiroVent deaerator/air separator is ideal for high temperatures up to 150C and high pressures up to 25 Bar. It should be installed at the hottest point within a system. In a heating system, this is where the water exits the boiler. In a cooling system, it is in the return before the chiller unit. When properly installed, the SpiroVent can deaerate the entire system by making the water absorptive. It removes all circulating air and micro bubbles effectively, greatly reducing the need for manual venting and eliminating unnecessary shutdowns. It constantly operates with a low pressure drop and offers a range of connection diameters to fit various system requirements.. Spirotech SpiroVent Air Separator For High Temperature and High Pressure - 3/4 inch Brass AA075/025