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  1. #1
    Join Date
    Apr 2013
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    Compression tank keeps filling

    Our compressor tank keeps filling on our Hot Water heating system. The water level in the sight glass creeps up about 1% a day. Is there any maitenance involed with the airtrol fittings? The PRV seems to be working fine.

  2. #2
    Join Date
    Oct 2011
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    The Airtrol fitting may be faulty or stuck, or you may have an air leak in the tank or gauge glass.

    If you made a recent change to the heating system, that can effect the level in the tank, or the water over time can absorb the air in the tank, but not at the rate you describe.

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