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Old 05-04-2008, 05:56 PM   #1
CharlieB
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Default Air Bubbles in the Siphon Hose

When I transferred this morning, I noticed an air bubble in the hose that was sloshing the beer passing through. I know you are suppose to prevent the beer from splashing when you transfer. It was just carrying air bubbles down the hose. Does it make any difference or is there a way to prevent it?

Thanks

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Old 05-04-2008, 06:16 PM   #2
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Originally Posted by CharlieB View Post
When I transferred this morning, I noticed an air bubble in the hose that was sloshing the beer passing through. I know you are suppose to prevent the beer from splashing when you transfer. It was just carrying air bubbles down the hose. Does it make any difference or is there a way to prevent it?

Thanks

I always tap the hose to knock the bubbles down the line. I never get rid of all of them, but the big ones will make it out. I never notice a problem w/this method.
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Old 05-04-2008, 06:24 PM   #3
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I couldn't sleep last night so I siphoned my beer to the secondary at like 2:30am and I got little bubbles stuck where my hose meets the syphon part.

I usually can't get them out of there but I have had no problem, yet!

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Old 05-04-2008, 07:03 PM   #4
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If you pinch the hose slightly just downstream of the bubble, the extra flow velocity usually sucks the bubble out. Voila! No bubble in hose.

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Old 05-04-2008, 07:16 PM   #5
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If you pinch the hose slightly just downstream of the bubble, the extra flow velocity usually sucks the bubble out. Voila! No bubble in hose.
Second. I always get a rather large bubble where the racking cane meets the hose. One or two good pinches gets rid of it easy.
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Old 05-04-2008, 07:59 PM   #6
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Thanks for the information, about pinching the tube!

I also noticed that where my homemade racking cane meets the hose if the clamp was not tight enough I got bubbles. I put a half turn on the clamp and they were gone.

Guess there was a very minor leak there.

Live and learn.

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Old 05-04-2008, 09:48 PM   #7
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Also keep an eye on stress cracks (especially at the bend) when the racking cane gets older. That was the source of some bubbles for me.

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Old 05-05-2008, 06:37 PM   #8
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I've noticed that too high a pressure (height) difference between the source and the receiver can lead to a high enough pressure to cause dissolved gases to undissolve (cavitate). I was tranferring a beer to a keg and I noticed that if the height difference was below a certain level I got no bubbles (using an auto-siphon) and when I raised it over that height it would start to make bubbles - these would be CO2 though, so I don't really worry about it.

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