as has already been stated here by others, I can only confirm the poor quality of Grohe cartridge. Also with us was this - and other Grohe cartridges - after 3 or 4 years already leaking. In an alleged quality providers like Grohe is this, particularly when considered in the price of this cartridge, absolutely incomprehensible. In a bathroom, I have the complete fitting from Grohe replaced with a new from the hardware store for a great price. The new valve was completely cheaper than a single cartridge from Grohe, furthermore, we now have in this bathroom no problems with leaks more. I can only advise of Grohe products.
