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Ravenheat combi boiler pressure?

The pressure has been accidentally set to almost 3 (bars) by pulling forward on the black tap undermeath - it should be < 2 bars. How can I reduce the pressure?
The tap seems reluctant to be pressed in the opposite direction.
Chris H, November 2009
you need to reduce the pressure in the system, the easiest way is to open a bleedvalve on a radiator and drain some water off but this may take some time. to be honest it doesn't really matter if it's 1 bar over, just leave it as it is.

paul, leeds, December 2009
Leave tha tap alone, (i.e closed) and reduce your boiler pressure by bleeding water away from a convenient radiator valve.

John, November 2009
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