|this may not be a simple fix but i would disconect the filling loop (the silver flexi pipe) and just open a drain cock to release the presure. If this does not work and the pressure keeps rising you will need an engineer|
|Simon, Not sure of the colour of the valve-but have phoned the installation guys and they advised me what to do-heating on now and pressure is below one! Thanks anyway for your help.|
|Sounds like the expansion vesel!|
what does the valve that emits water look like is it red?