Combi Boiler
Posted by Denis McCoy on April 27, 2004 at 05:02:33:
I recently drained the radiator system when I removed
one of the radiators in a downstairs room.
I then released the cold water tap to top the water upto the 1.5 bar mark and turned the system back on.
However water started shooting out from the air vent cap above the pump in my Valiant boiler.
I thought the problem had been resolved when I tightened the cap but I still have a small leak coming
from this cap.
Please can you advise what I have done wrong and if I can resolve.

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