Air vent on CH pipework

[1974stephen]

I'm just about to adjust pipework to allow our kitchen rad to work on its own zone valve. Just as I was about to start I thought of a potential issue.

The boiler is in the garage (ground floor), the flow will run across the garage, up across the first floor landing and back down to the kitchen rad on the ground floor.

Potential air lock in pipe as it crosses the landing I'm thinking, as it's the highest point with no air vent in my master plan.

What's the best way round? Is there some kind of auto air vent with won't need servicing that can be fitted under the floorboards on the landing?

Do I need to run the flow down the landing to the old airing cupboard (we have combi) where I can install an accessible air vent, and then pipe back along landing to go down wall to rad?

Or is there some other amazing way round it I don't know of.....yet?

 

[Charnwood]

http://www.screwfix.com/p/bottle-ai...ing url&gclid=CLaSoKuXoLUCFY7JtAodOicATw[url][/url]

 

[JayPage]

if your going spend the money on an AAV buy a spirovent. It will set you back 40 quid+ but you wont really get a better one on the market. These come as a half inch female thread as standard so youl have to get a copper to iron to convert to copper. I personally use a good quality ballofix valve (boss or ball'o'fix) and use this as the copper to iron, this gives you isolation the the AAV if there was ever to be a problem and means it can be changed without draining down the system.

 

[Nige F]

I'm just about to adjust pipework to allow our kitchen rad to work on its own zone valve. ?

Why ? that`s a strange setup

 

[1974stephen]

It's because the kitchen doesn't have a TRV, and also has doors leading to a conservatory that quite often lets cold air in; the stat in the hall wouldn't really react to that. I'm zoning a load of other stuff at the same time, so for the sake of another £100 I may as well put it on its own. Even if I were to plumb it off the zone that will consist of the rest of the downstairs floor, I'd still have the same air vent issue.