Water pressure in boiler too high

[mikebytheocean]

The pressure in my lpg boiler is normally around 1 bar. The other day I noticed it had dropped to .75 bar. I topped it up to 1 bar. When I checked the next day it had gone up to 2.5 bar. and when I checked outside it was venting water. I bled the radiators; there was a lot of air in one and I have since run off some water from a rad, yet the pressure remains the same with water venting outside. Any ideas what could be wrong?

Thanks

 

[kennedy1978mark]

you have left the filling loop open slightly causing it to keep topping up

 

[GQuigley67]

most likely you have left the filling loop open, it is recommended that the filling loop is left disconnected and only to connect it when filling up then d/c again to prevent stuff like this happening, you could damage your system.