do i need to re-pressure?

[goldsax]

hi , my first post on this forum. loads of info here,
but i could not find if i should do anything about my concern.
i have attached two photos of my boiler system.
the second photo shows an expansion tank.
it used to read about 2bar. but now it close to 1 bar.
i have turned the stop cock( its the black stop cock visible in pic 2) to allow water into the system to re-pressureise it but all i can hear is that water is flowing through the expansion tank but is not increasing the pressure to its usual value of 2+ bars.
can you please help me shed some light on what ( if anything) i should do.
p.s the combo boiler on the right in the pics is a separate system altogether.
thanks for your help.

Untitled

• goldsax
• 5 Jan 2014
• 1

Untitled

• goldsax
• 5 Jan 2014
• 1

 

[Gas2Air]

1 and a bit bar is correct. You sure you didn't see the guage when it was hot? If so it will give a higher reading. If you're trying to top up correctly and can hear water filling it maybe a blocked guage.