AAVs in my dad's bungalow

5 Jul 2005
Reaction score
United Kingdom
Gentle people

Last night my dad's AAV (in the loft) on the heating system broke and started leaking. We managed to get to it before the ceiling came down luckily.

Can we replace the AAV (auto valves) with manual valves to stop this happening again?

The system is run by a Concord WCF boiler operated by two pumps (one for heating and one for water).

We have a suspicion the AAV's are failry new anyway and was wondering if the frost had got to them. Ironically the AAVs have a warning not to insulate - strange. However we would prefer manual valves.

Does this type of system require an AAV anywhere in the system. If it does then we may need to site it somewhere where we can see it easily.
We only find out that its broken in the loft when we are swimming.

Your thoughts as ever are appreciated.


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in most systems aav's aren't even fitted, so cant see any problem in fitting a manual vent in there place.
what sort of system is it? has there prev been any problems with airlocks? would also be easier to say for certain if ya could post some pics?

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