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Thread: Sillcock Stem packing - how to replace? FU SAN frost-proof sillcocks

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    DIY Junior Member rockandroller's Avatar
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    Default Sillcock Stem packing - how to replace? FU SAN frost-proof sillcocks

    Hi all, we've got a couple of FU SAN anti-siphon frost-proof sillcocks on our house.
    (they are made in Taiwan, and appear to be virtually identical to a "Legend T-552")

    They're probably ten years old, and one has started to leak out the stem any time it is turned on.
    What little info I can find on the web indicates that it is likely time to replace the "stem packing".

    I have already tried tightening the nut ("stem gland screw") , but that doesn't slow the leak whatsoever.

    I have never opened one of these up, and have no idea what the "stem packing" looks like.
    But I'd prefer to have the replacement on hand before I start working on it (have to shut off the water to the whole house first!)

    Does anyone know if this 'packing' is a specially formed rubber piece - or can I just use some generic "stem packing" string??

    If string isn't going to work, any hints on where I can find a replacement 'packing'???

    The factory PDF drawings call it variously NB55, "Rubber", "Buna-n", NBR, and 'same as NBR' - it is part 5-1 in the picture...
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    Last edited by rockandroller; 07-14-2012 at 12:32 PM.

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