What Are the Functions of Hot Water Heating System (hydronic heat) Air Bleeder Valves?
Air bleeder valves, both manual and automatic, are used forced hot water heating systems to remove un-wanted air from the heating distribution pipes and radiators. Why is it necessary to get this air out of heating lines? Air trapped in hot water heating piping, radiators, baseboards, or convectors makes the heating system noisy with gurgling or bubbling sounds if there is just a little air in the heating system. But if the volume of air becomes too great, the heating system will simply stop delivering heat to the occupied spaces, some or all of them, in the building. Why? A heating circulator pump is capable of pushing water around in the loop of heating baseboard but is often not capable of overcoming a section of baseboard that contains a large bubble of air. It’s necessary to remove such air blocks. If air blocking has been recurrent a previous owner may have installed air bleeders at strategic points.
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