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Inverness

Inverness

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Gas Engineer
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Can someone explain to me how a primatic cylinder works?
 
[video=youtube;PCHaeuBm-wA]https://www.youtube.com/watch?v=PCHaeuBm-wA[/video]
 
Two air locks to keep the primary water separate from the secondary but with a suitable sized chamber that allows the bubble to be squashed so that expansion from the heating water does not cause it to be lost.

I have a loverly animated clip but can't get it to work on here.
 
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