Air in rad

[marsaday]

I keep getting air coming into my bathroom towel rail. it needs bleeding every few days.

does this mean air is getting into the rad from somewhere ? i cant see any leaks.

i recently drained down and used this rad to add the inhibitor to it. then i refilled the system.

i also noticed on the boiler today the pressure had decreased from 1.2 to 0.7 bar because i bled the rad last week. only just noticed this decrease though.

any ideas if i have cocked up ?

 

[PlumbBobBob]

no you have not cocked up. probably just excess air in system from drain down gradually working it's way round the system. just top the system back up to working pressure.

 

[marsaday]

righto, that sounds reassuring. Can it normally take say 2 weeks for air to move out normally?

 

[PlumbBobBob]

usually takes shorter time than that tbh.

 

[Spike295]

After re-filling a system the fresh water is airated & it can take anytime up till 3 weeks to completly rid itself of air so a slight pressure drop over this time is not too much to be concerned with.