Water pressure

[Joel Bamber]

Hello

Can anybody please give me any advice. I have a oil powered boiler providing my central heating. How can it be possible that when i run the boiler, the water pressure in the system is rising, it rises above 3mb then certain joints start to leak. The cold water inlet is definitley closed.

Thanks

 

[SimonG]

Sounds like the expansion vessel is goosed or pipe to it is blocked.

 

[dontknowitall]

I imagine the filling loop is letting by (water seaping in even when it's turned off).

If you undo the "tap" end and water dribbles out, this will be your answer.