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Old 06-18-2009, 07:05 PM   #1
Denvel
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I am making a jockey box. Is it ok to use 1/4" ID tubing, or will this cause the beer to foam?

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Old 06-18-2009, 07:11 PM   #2
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I used 50 feet of 1/4 inch ID tube and have no issues. You have to crank the CO2 up to 35psi.

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Old 06-18-2009, 07:14 PM   #3
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FYI- in case you were unaware-
Don't use copper tubing, you need stainless for a jockey box.

Stainless is a bear to coil compared to copper though. And at 50' you need 1/4" ID, 3/16" would be too much resistance.
-Ben

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Old 06-18-2009, 07:19 PM   #4
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i wouldnt go any less then 3/8 ID, your going to get a lot of friction loss with 1/4(like s__catz said " you have to cank the co2 up to 35 psi." ) but if your limited on space do what you gotta do...

cheers

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Old 06-18-2009, 07:22 PM   #5
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ok, why can't I use copper?

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Old 06-18-2009, 07:23 PM   #6
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copper reacts with CO2

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Old 06-18-2009, 07:25 PM   #7
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ah, I see.

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Old 06-18-2009, 08:31 PM   #8
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Copied from another thread:
4-101.14 Copper, Use Limitation.*

High concentrations of copper are poisonous and have caused foodborne illness. When copper and copper alloy surfaces contact acidic foods, copper may be leached into the food. Carbon dioxide may be released into a water supply because of an ineffective or nonexistent backflow prevention device between a carbonator and copper plumbing components. The acid that results from mixing water and carbon dioxide leaches copper from the plumbing components and the leachate is then transferred to beverages, causing copper poisoning. Backflow prevention devices constructed of copper and copper alloys can cause, and have resulted in, the leaching of both copper and lead into carbonated beverages.

Brass is an alloy of copper and zinc and contains lead which is used to combine the two elements. Historically, brass has been used for items such as pumps, pipe fitting, and goblets. All 3 constituents are subject to leaching when they contact acidic foods, and food poisoning has resulted from such contact.

The steps in beer brewing include malting, mashing, fermentation, separation of the alcoholic beverage from the mash, and rectification. During mashing, it is essential to lower the pH from its normal 5.8 in order to optimize enzymatic activity. The pH is commonly lowered to 5.1-5.2, but may be adjusted to as low as 3.2. The soluble extract of the mash (wort) is boiled with hops for 1 to 2½ hours or more. After boiling, the wort is cooled, inoculated with brewers yeast, and fermented. The use of copper equipment during the prefermentation and fermentation steps typically result in some leaching of copper.

Because copper is an essential nutrient for yeast growth, low levels of copper are metabolized by the yeast during fermentation. However, studies have shown that copper levels above 0.2 mg/L are toxic or lethal to the yeast. In addition, copper levels as low as 3.5 mg/L have been reported to cause symptoms of copper poisoning in humans. Therefore, the levels of copper necessary for successful beer fermentation (i.e., below 0.2 mg/L) do not reach a level that would be toxic to humans.

Today, domestic beer brewers typically endeavor to use only stainless steel or stainless steel-lined copper equipment (piping, fermenters, filters, holding tanks, bottling machines, keys, etc.) in contact with beer following the hot brewing steps in the beer making process. Some also use pitch-coated oak vats or glass-lined steel vats following the hot brewing steps. Where copper equipment is not used in beer brewing, it is common practice to add copper (along with zinc) to provide the nutrients essential to the yeast for successful fermentation.

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Old 06-20-2009, 04:24 AM   #9
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It is a beast finding stainless around here. What is the word on aluminum?

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Old 06-20-2009, 05:42 AM   #10
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You can get a premade 70' stainless steel coil with fittings from Jockey Box USA for $48. It hardly seems worth making the coil yourself.

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