?Our house came with a Grohe kitchen faucet. I don't have the model number but it's a single post-type faucet with controls and flex pipe for the wand all in the same counter top opening. The problem is that it's loose and I cannot figure out how to tighten it.
The part coming through the counter top seems to be nylon. There is a loose rubber O-type ring that is half-way compressed with what appears to be a piece of cast bronze with an open D shape. I cannot tell if the bronze piece slides into a grove to wedge it down, screws on threads to compress and hold the faucet in place or what it's supposed to do. When I try turning the D shaped piece of bronze, the entire faucet rotates and it seem solidly locked to the nylon piece.
Any ideas?
Mark