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ferroli f30b water pressure drops daily have no leaks not even prv?

ferroli f30b drops water pressure daily, prv not leaking, rad valves not leaking even checked pipe work under floor boards and still no leaks. took cover off boiler and still nothing.

steve
January 2010
FerroliHeating, Home Heating SystemsFerroli Pressure Leaking
sounds like expansion vessel my ferroli did the same and a corgi plumber recharged it

chris
February 2010
See my answer to Ferroli Domina 102 further down the index page to this section regarding the expansion vessel losing its air charge - this could be your problem.

Phil the fluter
January 2010
You may find that the main heat exchange is leaking inside the boiler and the water is evaporating out of the flue with the heat when the appliance is running.....

Ivy
January 2010

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