Hello, I am trying to pressurise my boiler so I can bleed my radiators. From a bit of research on line I think I need to turn two isolation valves in order to achieve this. I have photographed the set up along with the valves I think I need to turn in the attached photos. The one right next to the pressure indicator looks straightforward however the second valve, most instructions seem to indicate I should be able to turn this with a screwdriver. The only way I can see myself getting a grip to turn this would be with a pair of pliers. Can someone advise if I am looking at the wrong thing here or if this is a bad idea? Thanks in advance!