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automatic air vent

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J.JJ | 16:02 Wed 06th Aug 2008 | How it Works
3 Answers
Can anybody dirct me to a diagram that shows how a central heating automatic air vent allows air to escape but not water.

Many thanks in advance

John
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Avatar Image heathfield
One here, another here
09:00 Thu 07th Aug 2008
Avatar Image J.JJ
Question Author
Thanks heathfield , the information was exactly what I wanted.
15:18 Thu 07th Aug 2008
Avatar Image admarlow
www.mekongboutique.com
15:07 Fri 29th Aug 2008

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