Hi Fishbyname
This is a suggestion for you. On some tap cartridges you can turn the rubber seal (the red one) around and refit the cartridge. This doesn't always work but worth a try.
If it doesn't work take the red seal from the new...
The filter tap in our kitchen is leaking. I can see the cartridge is a bit worn so trying to get a replacement.
After a lot of searching I thought I had finally found it, but then realised it's about 1mm out (see pictures).
Does...