Please help with removing screw from bathroom tap

[adamc]

I am trying to replace the flow cartridge in the bathroom tap. I have turned off the water and removed the tap cover but cannot get the screw to turn. The screw looks to be some variation on a philips screw, i have tried different screw drivers but to no avail I have attached a picture, any advise would be greatly appreciated.

 

[JCplumb]

Drill it out if you can't unscrew it.
Use HSS bits starting at 3mm and slowly increase drill bit size until the head of the screw pops off. The thread of the screw will be left in the valve but you're changing that anyway.

 

[Pickwickpick]

Looks like a pozi drive and probably a no.2 although hard to guage the size from the photo. You should be able to get a selection of pozi bits fairly cheap from somewhere like screwfix. You won't be able to get a decent purchase on it with a philips bit.

 

[PETE 123]

could flood with wd40 then try next day

 

[Roy_66]

Taps are often held on with Philips rather than Pozi, and using a Pozi will chew it. A bit strange but true. Have you got some real Philips bits or screwdriver of right size? (Soak it with WD40 as above first).

Cheers,
Roy