over pressure in old boiler

[banedon]

Hi guys

I need a little help

Does anyone know how to reduce the pressure in my gas boiler? It's very high and I need to find a way to bleed the excess water pressure off.
I know to *increase* the pressure one turns the two cream coloured knobs/wheel underneath the boiler (in the last picture) but have no clue as to how to decrease it.

Any help would be very much appreciated.

 

[Burnerman]

Open any convenient radiator bleed screw (heating off) and catch the water that escapes.
Close the bleed screw when your desired pressure is reached.
John

 

[twgas]

You could let some water out a radiator bleed point, it may take a while but it is quite easy to do.

 

[banedon]

Hi guys

Many thanks for the replies .

I've started to bleed a radiator and although the pressure has gone down some I have a sneaking suspicion that the pressure keeps trying to go back up very slowly. Could there possibly be a valve in there somewhere which is trying to put the pressure back up? BTW this boiler is no way digitally controlled - it's all done using those two controls letting in water pressure.
Over a long period the pressure does drop down eventually and needs to be put back up using those controls which is why they are there.

P.S. I turned the power switch off to the boiler and also the boiler itself - it's all "dead" as it were

P.P.S I know nothing about plumbing/boilders so please keep this in mind


ADDITIONAL

I tried turning a cold water tap on and the water pressure went right down and continued to fall. But as soon as I turned the tap back on the pressure rose back up to what it was was within a minute. Same with the hot water tap - although the boilder didn't turn on as it nromally does as I turned it off.

Do I need to turn the water off somewhere else?

 

[banedon]

I stopped draining the radiator and the pressure went straight back up to what it was before