Our kitchen faucet with pull-out hose Grohe Euro Plus has been installed in early 1993. We had no problems. Now after 20 years after the dripping faucet. A new fitting costs about 480 EUR, but the existing still looks passable. We decided to spend a "repair". Research on the Internet, we came to the diagnosis that the cartridge have to be substituted. This I ordered on Amazon. The installation is really easy (sketch in the new cartridge available) and takes 12-15 minutes in real terms. Water at the faucet turn. Grohe Euro Plus from above "open". Loosen 2 screws. Fitting more open and take out old cartridge, insert the new and re-assemble in reverse order. Conclusion: Grohe faucets are top quality and the supply of spare parts by way of example (even after 20 years). We are very pleased with the results and recommend Grohe!