auto air vent valve leaking in the loft

Joined
25 Jul 2006
Messages
39
Reaction score
0
Location
Bristol
Country
United Kingdom
Morning,

I have just woken up to water coming through my daughters ceiling, which is always a pleasure! So, I have been up in the loft, half asleep, and I think I have traced the problem to an auto air vent valve which I am presuming is on the heating system (which is off) which is leaking some water (not much). As there is not much water leaking I have been googling around to try and find the problem so I can fix it (hence the post). I am about to head back up there and isolate it (it has an isolating valve). And then see if things dry off. I have a few questions though.

Will it cause problems elsewhere whilst this valve is switched off?
If the valve is leaking water, is this evidence that the air vent valve has gone or symptomatic of something else?
 
Sponsored Links
Joined
25 Jul 2006
Messages
39
Reaction score
0
Location
Bristol
Country
United Kingdom

I have just been up and turned off the valve. I also took a picture and dried everything off, just to see if water appears anywhere else. You can see on the top of the valve a wet patch, so water appears to be coming from the very top. I wonder if this has been leaking for a while.
 
Joined
2 Feb 2010
Messages
1,382
Reaction score
320
Location
Lancashire
Country
United Kingdom
Auto air vents always leak after a while, could possibly be due to sludge in system but they leak on clean systems aswell, ch and hw will work fine if i was you id swap it for a manual air vent.
 
Joined
12 Jul 2008
Messages
576
Reaction score
15
Location
Wiltshire
Country
United Kingdom
Auto air vents are good but you've discovered they do leak. You can keep it in place and just screw the black cap in but I'd personally replace it or anther AAV or a manual thumb vent.

Go steady with the ballofix Valve as that'll be the next thing leaking if ou turn it too much. Always turn it back to on the way you turned it off!
 
Joined
25 Jul 2006
Messages
39
Reaction score
0
Location
Bristol
Country
United Kingdom
The black screw on top was pretty much turned all the way to the right, does that sound correct as a setting?

I basically replaced like with like buying an auto air vent from screwfix for a fiver. Fitted it no problem and doesn't seem to be leaking (famous last words). This time the screw is not plastic, but there are no instructions about where to set it, any thoughts? It was screwed clockwise, I just loosed it slightly but didn't take it much further.
 
Sponsored Links
Top