Issues tying to undo mono tap cartridge Drainage and wastage systems and plumbing help, advice and answers

[Bexs]

I’m having a real problem try to undo a single mixer tap cartridge using mull grips is their anything I can do to loosen it, it’s absolutely solid and will not budge. All suggestions welcome. Image supplied.

[stoneyboy]

Hi beds,
You need to undo the chrome ring which holds the cartridge in place. Use you mole grips but protect the chrome ring with a strip of leather. The thing with the “odd shape” as you describe it is the operating lever - don’t try to undo this or you do more damage than good.
Regards S