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Question venting air in cental heating inverted loops

Hi,

I'm havining a go at installing all the pipework and rads for a new (combi boiler) central heating system to keep the costs down. All seems to be going OK, but I've got a question. I live in a bungalow and therefore becuase my pipework has to run through the roofspace, it's higher than all the rads and the boiler. Basically my flow and returns and both inverted loops. What do I use to vent the air at the top of these loops. I know it probably sounds like a stupid question, but I've been to B&Q and some of the online DIY/plumbing stores and the choice isn't very clear. There's lots of advice around about venting air from radiators, but that doesn't really help me. The main 'backbone' of the system in the roof is 22mm copper pipe if that's imporant.

Thanks in advance.
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Pet @ www.gymratz.co.uk
 
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aaron_wolves wrote:
Hi,

I'm havining a go at installing all the pipework and rads for a new
(combi boiler) central heating system to keep the costs down. All seems
to be going OK, but I've got a question. I live in a bungalow and
therefore becuase my pipework has to run through the roofspace, it's
higher than all the rads and the boiler. Basically my flow and returns
and both inverted loops. What do I use to vent the air at the top of
these loops. I know it probably sounds like a stupid question, but I've
been to B&Q and some of the online DIY/plumbing stores and the choice
isn't very clear. There's lots of advice around about venting air from
radiators, but that doesn't really help me. The main 'backbone' of the
system in the roof is 22mm copper pipe if that's imporant.


Why not just stick a 22mm "T" on both F & R at the highest point then
extend up 12 inches or so an bung an air vent on the top of each.

Job done.

--
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mike ring
 
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"Pet @ www.gymratz.co.uk" wrote in news:Wl3ee.24905
:


Why not just stick a 22mm "T" on both F & R at the highest point then
extend up 12 inches or so an bung an air vent on the top of each.

Job done.

That's about it.

I don't know if this is prarper practice but I made the highest point above
the flow and return risers from the boiler, and fitted auto bleed valves on
tees there.

Now someone's going to yell "Aaarghh - anywhere but there!" ;-)

mike


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