If your machine with screw heads protruding from original shower screen you have to replace the original shower screen with a flat screw Or reduce your coffee powder
#2
Easy to Clean Grouphead Provent coffee grounds from Grouphead
#3
For commercial Espresso machine 585mm such as E61 group head
#4
Due to the soild metal mesh that needs to pull shot with higher water tempperatures23Or use it for your second shot
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