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Wrong group seals

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  • Wrong group seals

    I could never figure out why the portafilters on my Grimac pointed to the 7.30-8 o'clock position irrespective of how old or new the grouphead seals were.

    The slightest accidental knock and they'd fall off. Lost count of the number of cups they've broken that way.

    The latest silicone seals have the right thickness stamped on them. 8 mm. As you can see at the bottom of the seal.


    But that thickness is wrong. Because they are in reality 8.5 mm--too thick.
    Click image for larger version

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    I've now bought some red ones which are of the right thickness and portafilters pointing the right way.
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