Hello
I understand that the F&E level relative to the overflow pipe can cause pumping over - or at least i think thats how I understand it, or think i understand how I think it works.
Anyway, my system (pumped, open vented, Y-plan, ancient boiler) always has air in it - i can bleed it out and then a week later the same quantity is back again. Primarily affecting the little rad in the airing cupboard which we can't switch off (bypass rad?) and also from the x2 air vent screws (x1 DHW, x1 CH side of 3 way valve).
The level of the F&E was 4.5 ish inches above the feed pipe.
Rather than drain it down, I turned off the cold water feed at the isolator to see if it drops of its own accord.
In a week, it dropped a little bit, enough that when the isolator was turned back on there were a small stream which quickly turned to hissing then drips from the feed tap (not a lot basically).
interestingly there was less air to bleed after a week - noteably less.
I assume this drop in level isn't significant enough to cause concern or am i wrong - is it likely evaporation rather than a leak..
Also as there was less air I was thinking of leaving it longer term without the cold feed enabled and keep an eye on it, with a view to lowering the level.
Does any of this cause alarm?
Thanks
I understand that the F&E level relative to the overflow pipe can cause pumping over - or at least i think thats how I understand it, or think i understand how I think it works.
Anyway, my system (pumped, open vented, Y-plan, ancient boiler) always has air in it - i can bleed it out and then a week later the same quantity is back again. Primarily affecting the little rad in the airing cupboard which we can't switch off (bypass rad?) and also from the x2 air vent screws (x1 DHW, x1 CH side of 3 way valve).
The level of the F&E was 4.5 ish inches above the feed pipe.
Rather than drain it down, I turned off the cold water feed at the isolator to see if it drops of its own accord.
In a week, it dropped a little bit, enough that when the isolator was turned back on there were a small stream which quickly turned to hissing then drips from the feed tap (not a lot basically).
interestingly there was less air to bleed after a week - noteably less.
I assume this drop in level isn't significant enough to cause concern or am i wrong - is it likely evaporation rather than a leak..
Also as there was less air I was thinking of leaving it longer term without the cold feed enabled and keep an eye on it, with a view to lowering the level.
Does any of this cause alarm?
Thanks
