really easy question!

Hi all
What materials could be used safely in a coffee machine
Im not going to get too deep into it but i am modifying an espresso machine and will use a plumbers pipe insert part for this
The part will be in direct contact with the coffee and hot water
I assume copper is safe? i can get the part in polycarbonate copper or brass (possibly stainless steel)
Regards
niall
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Think about it. Whatever materials are used in cookware should be OK. Stainless steel is most common but they also make copper pots and pans.
MM
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