How to remove the valve?

Ashley

I’m about to take the plunge and order some Radioator valves but I’d like to check compatibility first. I’m scared to remove the valve. When I start to unscrew it the silver bit at the bottom starts to move too - is this correct?
Photo on the Dropbox link.
https://www.dropbox.com/s/vp03rx3mp82jry6/IMG_1307.jpg?dl=0

Many thanks
Ashley

Ashley

I should clarified that I mean the silver ring immediately below the Grey part. Not the very bottom.

samd

@Ashley Yep you should be unscrewing it by the silver ring. Unscrewing that should reveal a pin which is pushed down or released by the 'grey part' to be replaced by the tado thermostat.

Ashley

I started to unscrew this on one radiator and started to get water coming out so stopped. I was twisting the grey part and that started to turn the silver ring, should I just be screwing the silver ring?

samd

@Ashley You should unscrew the silver ring.