I think my tap is the Grohe Bau curve 2017 model onwards. So the cartridge is 46963000. It costs on eBay £53 delivered.
A new Grohe tap (prob the same design) at screw fix is £65. Any idea why the cartridges are so expensive ? I may as well buy new as I can change myself. Seems a waste.
--- and then you can attempt to dismantle the old one to access the cartridge and discover how that's almost impossible without damaging the chrome parts.
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