Quick MILL Carola Owner's Manual - page 11
Group Gasket And Shower Screen Replacement
The group gasket is a black rubber or blue silicone gasket. This makes the seal between
the portafilter and the group head. We recommend replacing the gasket on a yearly basis
which will make the replacement procedure much easier. The Carola uses an E61 8.5mm
gasket. They can be purchased from our website at the link below:
https://www.chriscoffee.com/Group-Gaskets-p/groupgasketg.htm
Replacing the group gasket requires the removal of the shower screen as well so we also
recommend replacing the shower screen at the same time. The E61 shower screen can be
purchased from our website at the link below:
https://www.chriscoffee.com/Group-Shower-Screens-p/groupshowerg.htm
If water is leaking around the portafilter while brewing then the group gasket should be
replaced.
Before replacing the group gasket and shower screen the machine should be turned off
and cooled down so that the grouphead is cool to the touch.