Easy to replace - all you need is patience and a awl or a sharp screw driver.
- Remove the shower screen by unscrewing the main screw.
- Remove the old gasket: Use an awl to remove the gasket or sharp screwdriver - it will come away in pieces as it will be brittle.
- Insert supplementary gasket 1st, (if needed) then the new group gasket, replace the brass shower holder and screw back.
- Screw back the shower screen.
- Changing the group gasket every year will make this job relatively easy to do.
When to replace: When the coffee starts to over flow from handle, when making a coffee. You won't have the correct pressure to extract the coffee, leaving a diluted watery taste in the coffee.