Does gas build up in secondary fermenter?

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Tangentile

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I'm doing my first extract brew. I guess it's a light lager-style, brewed with LME and sugar. Yeast was a Saflager S23. The temperature was between 22 and 24 degrees, which I know now is a little warm for that yeast.

It stopped fermenting in the primary about eight days ago and is reading 1.005 consistently. Smells and tastes great and quite dry. I was planning to rack it off into a jerry can which I was then going to put into a coolroom for a couple of weeks before bottling.

My question is, when the yeast gets down to a temperature it likes will fermentation start again? I don't have an airlock fitted to the jerrycan and was planning just to screw the top on. I just don't want the jerry can to explode in someone else's coolroom, as I won't be able to keep checking it and letting off any residual pressure.

Any thoughts?
 

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