Would some kind soul enlighten a newbie.
What does a pressurised and non-pressurised portafilter do. I understand the meaning of the word pressurised but I dont have any idea how it applies to a PF.
Are there pros and cons for each type?
Does one purchase them as optional extras?
How do you know if your grinder has a pressurised or non-pressurised PF?
Maybe you could just point me to some web page for explanations/discussions if this topic is too old hat for the experts.
Thanks
[I did try a search but found nothing simple enough]
What does a pressurised and non-pressurised portafilter do. I understand the meaning of the word pressurised but I dont have any idea how it applies to a PF.
Are there pros and cons for each type?
Does one purchase them as optional extras?
How do you know if your grinder has a pressurised or non-pressurised PF?
Maybe you could just point me to some web page for explanations/discussions if this topic is too old hat for the experts.
Thanks
[I did try a search but found nothing simple enough]

. Turn the water on at a moderate rate with no nozzle attached and the water runs into the bucket and not much happens to the car wash liquid. But fit a high pressure nozzle to the hose, and the same flow of water produces copious froth and bubble. This same behaviour is what froths up the relatively crema-less coffee otherwise produced in a pressurised basket and makes it look like the real deal.
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