I had a new Worcester Bosch heat only boiler fitted nearly a month ago with one of those filters inline above the boiler. The heating bloke also replaced a manual bleed valve with what he said was an automatic one in the airing cupboard upstairs. He did this off his own back, fair enough. I have not had to bleed the manual one for about 20 years. When he had finished installing everything there was a trickling noise from the filter which he said was a bit of air and to bleed the valve on top of the filter which I did but had to stand on some step ladders to see where and what I was doing. A couple of days ago it needed bleeding again. Now why is the automatic air bleed valve in the airing cupboard not dealing with this? (See photo) Also he put a 250 ml bottle of Fernox into the system when refilling, he left the bottle. Now I used to put a 500 ml bottle in when I used to empty and clean out the f&e tank, draining some water off before adding the inhibitor and refill. Is 250 ml enough for an 11 rad property?
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Air in filter
- Thread starter pandaman
- Start date
Did not know you had to leave it open. Was not told this. Thought 250 mls a bit low might add some more. Thanks for info.
You leave them open, until all the air has been expelled, then close them. They have a tendency to leak if left permanently open.
Thanks for that info.
I believe Fernox do a concentrated version. See what it says on the bottle
It will indicate in the instructions, on the bottle, roughly how many radiators it will satisfy. It will do no harm, to have a bit too much in.
Fernox do a 265ml bottle - it will cover 100L and is an ideal size to top up a system that already has a level of inhibitor.
AAV's are actually meant to be left open all the time, hence the automatic nature of them but in reality a lot of them do leak after a time, usually in places that aren't monitored. Some are a lot better than others and are open all the time. The bottle float type can be bad for leaking.
I use Flamco Flexvents, never had a problem with them leaking up till now (touch wood).
AAV's are actually meant to be left open all the time, hence the automatic nature of them but in reality a lot of them do leak after a time, usually in places that aren't monitored. Some are a lot better than others and are open all the time. The bottle float type can be bad for leaking.
I use Flamco Flexvents, never had a problem with them leaking up till now (touch wood).
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