New Mixer Tap Rusting?

[congresstart]

Hey all,

I had a hot/cold kitchen skink tap changed over to a mixer around 6 months ago, I've had to clean what looks like rust from the base of the tap almost daily.
I've attached an image below.

Is this likely to be the tap or something within the pipe system at fault?

 

[Harry Bloomfield]

Is this likely to be the tap or something within the pipe system at fault?

Where it is appearing, I would suggest it is the grub screw which retains the swivel spout, which is rusting. It's usually an allen grub screw, if you can remove it, and swap it for a stainless steel version.

 

[HERTS P&D]

Take it back and get a refund.

Andy