When your Grohe bathroom or kitchen faucet stops working and you need a new component, you must make sure that it is a Grohe before buying a replacement. Both newer Grohe faucets and older models feature the company's name, letting you know that it is authentic. The location of the maker's mark might vary, depending on the model or age of your piece. Identifying an authentic Grohe faucet requires finding the mark on one of the faucet components.
Check the visible parts of the faucet, including the upper part of the stem and the curved piece that releases water. The faucet might have Friedrich Grohe or simply Grohe engraved into one of the top parts of the faucet.
Examine the bottom of the faucet stem. The stem is the straight metal piece that slides through a hole in your sink. An authentic Grohe faucet lists the manufacturer's name on the faucet. You should see Friedrich Grohe or Grohe in capital letters on the stem.
Unscrew the screws and bolts holding the sink in place with a screwdriver and wrench. Check each part, looking for the Grohe name in capital letters. If it is authentic, you should see the company name somewhere on the piece.
Visit the Grohe website and compare your model against the current models available from the company. Even if the company no longer makes your exact model, you should notice similarities in terms of shape and design.
Contact Grohe directly and ask about your particular model. For replacement parts or technical support, the company requires a model name and other identifying marks. Explain that you cannot find any identifying marks, but want to verify the authenticity of your faucet.