Rocket Espresso Valve O-ring Part
If you want OEM o-rings, I'd contact one of the USA sellers of the machine.
Otherwise, hardware stores like Ace and TrueValue have drawers of both metric and SAE o-rings, as do auto parts stores like NAPA.
I'm guessing these will want to have a food safe grease applied to them during installation.
Otherwise, hardware stores like Ace and TrueValue have drawers of both metric and SAE o-rings, as do auto parts stores like NAPA.
I'm guessing these will want to have a food safe grease applied to them during installation.