There are quite a few things wrong with this faucet.

  1. There is a lot of dried up minerals that make it impossible to rotate the faucet. If rotated, the faucet rotates at the base instead of the mid section. The mechanism seems jammed. How do I clean this part so it rotates smoothly once again?

  2. The base used to have some sealant which came off so I used some soft silicon gel to seal it at the base. As you can see the it has separated from the faucet's metal base but is still adhered to the granite (?). What is the right product to seal this properly?

  3. In an effort to fix #1, I have tried going under the sink and tightening the bolt but no matter how much I tighten it, the whole faucet seems to move mainly due to the aforementioned mechanism being jammed.

Do I need to bite the bullet and replace the faucet or is this fixable?

We seem to live in an area where water is excessively hard (320PPM) so I am guessing this will recur. Is there a way to prevent it?

Whole faucet

Base of the faucet

  • that joint is not exposed to the water supply, so that grime did not come from the water supply but rather from the cleaing processes used.
    – Jasen
    Oct 11 '20 at 3:40
  • limescale is the same stuff as your marble benchtop so there's unlikely to be a good chemical solution to this.
    – Jasen
    Oct 11 '20 at 3:42
  • What ever you do is going to entail a lot of work...and it might not solve the problem. I'd replace it. You will eventually. Oct 11 '20 at 4:35

Remove it from the bench and soak it in lime remover (white vinegar, dilute muriatic acid, etc)

Disassemble it, and clean the parts.

lubricate it with Vaseline (or other petroleum jelly)

Replace any worn seal found, reinstall it

There should probably be some sort of circular gasket or o-ring between the base and the benchtop.

  • +1 - A little CLR, Limeaway or Kaboom should do it.
    – HoneyDo
    Oct 11 '20 at 4:08

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