Expanion vessel has water in, but still functions properly.

[mike]

Hi, today i had to remove the expansion vessel on my oil combi boiler inorder to change a auto air vent which is leaking, i took the opertunity to rechardge the expansion vessel so i drained the system then the expansion vessel out (the water side) and discoverd there was still some water in there but in the air side! so i turned it upside down (the schrader valve is on the top) and drained the air out and the water came out about about 20ml, the thing that confused me is that the system worked fine pressure has never risen above 1.5 bar and the vesel air pressure never drops.etc so should i replace the vessel or should i just keep using it .

 

[diamondgas]

Keep using it ...checking on it...using it...etc ......... If the prior symptoms before re-charging reoccur then replace IMHO

 

[solarsavings]

You can get condensation in an ev between the bladder and the casing.

Edit: I meant in the bladder

 

[tamz]

20ml out of a 2 gallon expansion vessel. Think about it. Im sure if someone turned me upside down and shook me there would be 20ml out of somewhere.
Think logically

 

[Killy Bing]

You tend to get a small amount of water in the air side, thats normal.

on the big ones we have for thermal stores ive had a litre out!

Guessing its from compressing the air
h2o and all