How do I replace the cartridge on this tap?

Question

I have this specific tap https://www.screwfix.com/p/seaford-basin-mono-mixer-tap-with-pop-up-waste/853fv On my bathroom basin. It is leaking from the cold water stem when turned on, so I believe I need to replace the cartridge on that side.

I have consulted several articles and videos and it's fairly clear what has to happen, but I cannot figure out how to remove the handle.

I have several theories, but nothing wants to budge (probably in part because of 10 years of hard water) and I don't want to apply the level of force required to turn a jammed 10 year old part unless I know I'm doing it the right way.

So does anyone know specifically how to gain access to the cartridge on the above linked tap?

Answer 1

Unfortunately that seems to be a discount "unbranded" faucet; in other words it is likely mass produced in the far east or is an unlabeled version from a more common manufacturer. As such, finding parts diagrams to help with disassembly will probably be just as difficult as finding any actual parts.

I will say that the cartridge for this style is commonly accessed by removing the chrome "button" at the top of the handle, then removing a screw underneath that holds the handle on. Once the handle is unfastened and removed (which may require a handle puller tool if it's stuck), then the threaded chrome collar is unscrewed anti-clockwise (when looking from the top). Then the cartridge can be pulled directly out.