air in rad

[joehealey]

I have a new boiler fitted a vailant ecotech28,ever since i have air in the bathroom radiator, and keep having to bleed every four days, no loss of pressure and no leaks can anybody help yes system flushed and inhibitor added

 

[JohnD]

Might be corrosion forming gas

Was it flushed when the new boiler was fitted, and refilled using inhibitor?

Corrosion on a new boiler is very undesirable.

 

[bengasman]

I daresay you must be mistaken. If you keep bleeding, you must loose pressure unless there is gasforming. That should be ruled out as you say the system is flushed.
How old is the boiler? What is the pressure when system is fully cold and what when fully warm? How do you know the system was PROPERLY flushed?