Quick and simple questions, my boiler currently doesn't have any bleed valves and the system can be a pain to bleed. I therefore intend to fit at least one valve (was thinking of an automatic bottle vent) to either the feed, return or both immediately above the boiler. Is it usually necessary to fit on both the feed and return and is an automatic bottle vent the way to go or are manual vents better?
Do boiler feed and return generally both require bleed valves
- Thread starter craig1234
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boiler will be a vaillant ecotec 430 (going to change the Ravenheat out) - have an airing cupboard with a manual bleed on the HW coil of the cylinder. There is also an automatic vent on one of my pumps (this serves the extension rads that I put in). The only other means of losing air is through the vent to the expansion tank. Essentially, the only place to bleed the air (apart from the rads) is all in one place i.e. the airing cupboard as this has the pumps, cylinder and vent to the tank. There are no bleeds anywhere else and certainly not on the boiler which is in the garage
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Reading between the lines I assume you are carrying this work out yourself?..if so then you should know so why the questions??
If someone else is replacing your boiler then why the concern??
I suggest you go for the latter as obviously you have no idea.
If someone else is replacing your boiler then why the concern??
I suggest you go for the latter as obviously you have no idea.
If you fit an aav, make sure it is not on the negative side of the pump.
Thanks Oilhead
Gaswizard, I will be undertaking the pipework (water) myself but have someone else (qualified/registered) who will take care of the boiler. I do I like to think have some idea about what I am doing and one of the reasons for this post was because I have doubts about what I was told by another "qualified" technician who clearly had little idea about what he was doing (he couldn't fix a fault that I had so I no longer use him). This person indicated that I should fit a couple of bleeds adjacent to the boiler (seemed ok but thought would query) plus another three in the airing cupboard which seemed totally unnecessary as there are already 3 ways to vent there!
Gaswizard, I will be undertaking the pipework (water) myself but have someone else (qualified/registered) who will take care of the boiler. I do I like to think have some idea about what I am doing and one of the reasons for this post was because I have doubts about what I was told by another "qualified" technician who clearly had little idea about what he was doing (he couldn't fix a fault that I had so I no longer use him). This person indicated that I should fit a couple of bleeds adjacent to the boiler (seemed ok but thought would query) plus another three in the airing cupboard which seemed totally unnecessary as there are already 3 ways to vent there!
A couple of thumb vents won't hurt but I'd consider converting to a sealed system.
+1!
Seal it up - keeps system water in good condition and stops nuisance air intake. Obviously will find any weak joints currently in pipework but that's a known risk and can be dealt with.
Seal it up - keeps system water in good condition and stops nuisance air intake. Obviously will find any weak joints currently in pipework but that's a known risk and can be dealt with.
Time for an update.
I decided to live with an open vent system but fitted thumb vents to both feed and return immediately above the boiler and these seemed to make a world of difference when I re-filled the system - took much less time to vent the air and I was surprised that even after a week only a couple of the rads required bleeding which was a first!
Thanks to all who offered advice.
I decided to live with an open vent system but fitted thumb vents to both feed and return immediately above the boiler and these seemed to make a world of difference when I re-filled the system - took much less time to vent the air and I was surprised that even after a week only a couple of the rads required bleeding which was a first!
Thanks to all who offered advice.
Big old beast the 430 - you could probably run a dozen rads from it!!
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