I need to replace the washer on my WC double flush valve.
As you can see I have removed the cartridge successfully
I’ve look carefully but it’s not marked with the name of the manufacturer so I don’t know who to contact to order the correct replacement washer.
The OD of the washer is about 3”.
Also I wonder what the procedure is to replace the washer.
Does it unscrew? Do you prise it off somewhat like a bike road tyre?
Grateful to receive the advice and guidance from forum members.