It's not a combi...
The ABV is on the flow from the cylinder....
I will check that it is air..
I haven't found any leaks (no puddles on the floor or coming through the ceiling)...
I have a rad that fills with air every couple of days!! A plumber fitted an automatic valve to the system which helped a small amount... The ait valve is lower than this rad.
Any ideas on why I am getting so much air in this one rad?
Thanks
