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	FORUM ON BEER, HOMEBREWING, AND RELATED ISSUES
		Digest Janitor: pbabcock at hbd.org


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Contents:
  re: Keg Gas question ("jeff_ri")
  Injecting O2 ("A.J deLange")


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Date: Wed, 21 Oct 2009 08:39:57 -0400
From: "jeff_ri" <jeff_ri at cox.net>
Subject: re: Keg Gas question

Hi All,

  In HBD #5620 Rowan Williams asked about adding small amounts of O2 along 
with CO2.

  I've always purged the CO2 line right before connecting to the keg.

  It's possible that the line is full of air if you open it up to the 
atmosphere to change the fitting on the end of it.  There will also be some 
amount of O2 diffusion through the plastic tubing over time due to the O2 
partial pressure.

  I try to keep as much O2 out of the keg/beer as possible.  I've 
successfully had beers kegged for long times (years) and not had very much 
oxidation.

Jeff McNally
Tiverton, RI
(652.2 miles, 90.0 deg) A.R.
www.southshorebrewclub.org




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Date: Wed, 21 Oct 2009 08:51:24 -0400
From: "A.J deLange" <ajdel at cox.net>
Subject: Injecting O2

RE: "... am I also inadvertently adding some O2 to the keg...?"

Yes, probably a bit. If the gas line stays connected to a regulator or  
manifold under pressure then no air will ever get into the line and  
it's "no worries, she'll be right" (trying to remember my 'Strine  
here). If, OTOH, the gas line has become depressurized and opened to  
the air, some will get into the line in which case simply depressing  
the pin in the center of the connector (a bit painful but it doesn't  
take long or use a key or screwdriver) once the gas is back on will   
purge the line sweep out any air that got in during depressurized  
storage.

A.J.




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