Kitchen Tap cartridge issue.

[Bp89]

I have attached an image of a kitchen tap which requires the housing around the cartridge to be removed. The housing is much more than hand-tight and I was wondering if plumbers have experienced this type of tap and how the housing is removed without damaging it.

Thanks.

 

[Rtplumb]

Is there a small grub screw at the back of the housing?

 

[ShaunCorbs]

Strap wrench

 

[Bp89]

Is there a small grub screw at the back of the housing?

Thanks. No.

 

[Bp89]

Strap wrench

Thanks.