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Radiator coinnection leaks

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Sandy255
Sandy255 Posts: 1
in THE MAIN WALL
I have replaced an old (c. 1920) coal/oil boiler with a new high efficiency gas boiler.  Works beautifully but I now have small leaks from several column radiators where they connect to the valves. Tightening the nut does not completely solve the problem.



One radiator has been an historic problem: when I first disconnected the radiator about twenty years ago I noticed that one of the "dead guys" had sealed the fitting under the nut with some sort of packing.  I used new packing and (rarely) had a problem - until now.  I've tried graphite valve packing and various plumber's sealing compounds - even waterproof silicone.  The water still runs out.  Suggestions please.

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  • Unknown
    Unknown
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    Leaks

    Is this a steam or a hot water system?  It might help it you could post a picture of the leaking connection.

    - Rod
  • Big Ed_4
    Big Ed_4 Member Posts: 2,795
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    Union Connection

    Clean the old union contact surface with steal wool , then dab just a little plumbers grease on the contact surface area to make up and imperfectionTry not to get any grease into the system ....

    There was an error rendering this rich post.

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