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Old 02-16-2009, 01:47 PM   #71
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I decided to hook a standard 1/2 racking cane to the aeration gadget on this weeks brew. Worked like a charm;



To avoid leaks when starting the siphon I found by covering the venturi hole until the wort clears this point is a good idea

Cheers
Steve

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Old 02-16-2009, 02:25 PM   #72
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Quote:
Originally Posted by conpewter View Post
Bernoulli's Principle should work no matter if it is a siphon or pump.
Bernoulli's principle is essentially the creation of a low pressure zone. So yes, it works but if your pump puts the fluid under positive pressure it may overcome the low pressure created by the Bernoulli effect. Under siphon, the fluid is already under low pressure so it amplifies the Bernoulli effect.
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Old 02-16-2009, 03:07 PM   #73
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A simple plastic T in line makes a great venturi.

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Old 02-16-2009, 03:26 PM   #74
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Quote:
Originally Posted by PhlyanPan View Post
Bernoulli's principle is essentially the creation of a low pressure zone. So yes, it works but if your pump puts the fluid under positive pressure it may overcome the low pressure created by the Bernoulli effect. Under siphon, the fluid is already under low pressure so it amplifies the Bernoulli effect.
I agree, I want to make some way for this to work though. I suppose I can just go back to shaking. I can't siphon through my CFC and into a fermenter due to height differences.

I was wondering if the fact that the CFC was 1/4" ID slowed the wort down so much that I couldn't get it to flow fast enough through the tube. But seeing as I got a spray out of the "venturi" hole... I'm not sure I can make this work.

May end up doing as the big breweries do and put an in-line oxygen stone (more work...) or I'll just shake the carboy.

Edit:
I may have it working now. I used some lineman's plyers to squeeze down the tube around where the whole is, it seems to suck in air but I've been having issues priming my pump still (new brew-stand) so I can't test it fully yet.
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Old 02-17-2009, 12:42 PM   #75
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Quote:
Originally Posted by conpewter View Post
I agree, I want to make some way for this to work though. I suppose I can just go back to shaking. I can't siphon through my CFC and into a fermenter due to height differences.

I was wondering if the fact that the CFC was 1/4" ID slowed the wort down so much that I couldn't get it to flow fast enough through the tube. But seeing as I got a spray out of the "venturi" hole... I'm not sure I can make this work.

May end up doing as the big breweries do and put an in-line oxygen stone (more work...) or I'll just shake the carboy.

Edit:
I may have it working now. I used some lineman's plyers to squeeze down the tube around where the whole is, it seems to suck in air but I've been having issues priming my pump still (new brew-stand) so I can't test it fully yet.
I had the same problems when I made mine. I think perhaps that your hole is too big. I'm using 5/16ID 7/16OD hose and the venturi is 1/4ID 3/8OD piece of hose. I heated up a needle and made one hole in the venturi. This is a small enough hole that wort doesn't spray out of it, yet it is big enough to insert air into the hose. I don't even have to cover it when I start the siphon.

I've only tried with water, but it appears to be OK. It was creating bubbles.

Last edited by njnear76; 02-17-2009 at 12:48 PM.
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Old 02-17-2009, 01:57 PM   #76
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Quote:
Originally Posted by hammacks View Post
A simple plastic T in line makes a great venturi.
Now that makes good sense!
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Old 02-22-2009, 02:05 PM   #77
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I thank you guys so much for this thread. I have a bad back and it sucks shaking a full carboy. Ill be trying this out in 3 weeks.(Gotta wait for an open carboy)

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Old 02-22-2009, 02:14 PM   #78
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Quote:
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I've been using this successfully for years but from copper.





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Old 02-23-2009, 02:41 PM   #79
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I finally moved my venturi from the end of the transfer hose to the front of it, about 4" from the valve on my kettle. Judging from the volume of foam produced, it works better than at the end of the line.



That's about 1/2 way through the transfer, after using defoamer during the boil. The WLP862 starter I pitched (which can be a slow starter, especially at lager temps), is starting to krausen this morning, about 10 hours after brewing.

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Old 02-23-2009, 09:52 PM   #80
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I just gave the aeration gadget another test run
This time I reused the Nottingham yeast cake and fermenter from a previous batch of beer. I was expecting the blow off from hell but it didn't krausen over and it's already through it's primary after 2 days

Cheers
Steve

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