I have been topping the pressure up on my ferroli f24 b boiler for a number of weeks now but it is getting worce.
I have topped up the expansion vessal to 1bar and there is no obvious leaks but still drops. Was hoping someone may have a solution to this problem.
Gerry

gerry bruen, December 2008

when topping up exp vessel make shore there is no pressure in system and that it is open to atmosphere,by opening a drain cock.

stuart, December 2008