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    boomer2's Avatar
    boomer2 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Oct 18, 2007, 01:24 PM
    Hot water loop off a steam furnace
    My 3 year old furnace heats steam radiators in the house. A hot water loop was installed to heat hot water radiators in the extension. No nail holes have been found in the piping yet air always gets into the system, flooding the furnace. Should the hot water part of the house have its own furnace? We have been trying to trouble shoot this problem for the past two winters. Help.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Oct 19, 2007, 03:52 PM
    You have a check valve missing.
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