Hi there...

i bled my 1st floor radiators earlier as the tops were cool but the
bottoms were hot.

I cant however find the place where I need to top up the pressure in
the system.

There is a potterton combi bolier in the corner of the kitchen, and a
flexcon pressure gauge under the sink whic is nearly on 0bar, but i
cant see a way to add more water into the system to bring pressure up.

Any idea or anyone familiar with these brands?

I suspect I have left important info out that might help to hlep me, so
please let me know!

thanks.