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  1. #1
    Join Date
    Dec 2008

    Default Baseboard Heat Expansion Joint Leaking

    I have expansion joints AKA (Full Expansion Coupling) in my basebaord heating system (Base Ray Cast Iron Baseboards) where the baseboard heaters transition to 3/4" copper in a closet between bedrooms. One of the expansion joints has a little bit of green crud near the fitting and it is leaking small amounts of water. Can I disassembly this fitting and repack it or replace a washer, or do I need to replace the expansion joint? SEE SAMPLE STOCK PHOTOS. If replacement required, are these readily available. I am in southern NJ area.
    Thanks, Stephen

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    Last edited by shoagie; 12-06-2008 at 11:14 AM. Reason: typo

  2. #2
    Join Date
    Feb 2008

    Default Re: Baseboard Heat Expansion Joint Leaking


    I would bring a copy of the photo of the valve around to your local heating parts stores---they should have a replacement, and possibly just the replacement washers.

    Consult the Yellow Pages under "Heating Equipment- Parts & Supplies".

    If you have trouble finding this item, the Slant/Fin site below also shows flex tubing that can also be used for this application.

    A third possibility would be to remove the offending coupling & solder a short length of copper tubing at right angles using ordinary 90 degree elbows.

    This would also allow the piping to flex slightly when heat expansion occurs.
    Last edited by NashuaTech; 12-08-2008 at 11:41 PM.

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