Hello Mattew,
A naked or bottomless portafilter has had the bottom cut off or is made without a bottom to funnel the flow.
Look it up on the net and you can find plenty of pictures and stories about them.
It allows you to see how the flow is. If ok the coffee runs in a single stream in the middle while if it channels unevenly it may squirt in all directions.
I use one whenever using my single basket which is most of the time.
Barry
A naked or bottomless portafilter has had the bottom cut off or is made without a bottom to funnel the flow.
Look it up on the net and you can find plenty of pictures and stories about them.
It allows you to see how the flow is. If ok the coffee runs in a single stream in the middle while if it channels unevenly it may squirt in all directions.
I use one whenever using my single basket which is most of the time.
Barry


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