Espresso machine portafilters can become loose over time. Replacing the rubber seal does not always solve the problem. Insert the portafilter gasket. A 58mm portafilter spacer is $9 plus shipping. This gasket material is the same thickness as industrial portafilter gaskets. It took 15 minutes to trace and cut one with an Xacto knife. I have enough materials to make at least 25 more parts.
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