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Old 02-24-2009, 03:29 PM   #31
pizzaman
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Default Push Button MiniKeg

About to head out to Lowes to do some sizing and hopefully buying of pvc...as I was finishing my coffee I had an idea for automatic release of CO2, sort of a push-button system. Have a looksee and tell me what you think:

The top half of the tube isn't permanently attached, and can slide up and down the smaller middle tube, which is permanently attached to the bottom tube. When you want a drink you press down on the top of the tube, which activates the CO2 cartridge, forcing beer through the feed tube.



Would having the feed tube constantly open to the bottom of the minikeg cause any oxidation issues?
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Old 02-24-2009, 05:55 PM   #32
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Here's the cap before applying cement:


The bottle with everything assembled, prior to sealing:


Once cement is dry I'll do a pressure test and post the results and a diy guide.
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Old 02-24-2009, 09:07 PM   #33
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The first attempt failed to hold pressure. I am rethinking the overall design, still trying to keep it under $10. I did learn that a 1/2" pipe fits snugly inside of the rim of the 2 liter, which may be useful. I'll probably end up doing something with brass similar to what I have seen others do...
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Old 02-25-2009, 08:07 PM   #34
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Default This may just work...

My second attempt after much more thought has produced a working result. It's not pretty, but it is cheap and effective. I took the schrader valve I had, stripped the rubber off the metal core, and wrapped it in threading tape. Then I inserted it into a short piece of 3/8 tubing, wrapped the tubing in a thin strip of duct tape covered with threading tape. The tube is inserted in a water bottle cap with enough room left for one more tube of equal size to be inserted in the same cap. To my surprise, the water bottle held 20 psi with no leaking. My next purchase will be a picnic tap which I will attach to a second tube attached to the lid next to the schrader tube in the same way, with the tubing running straight to the bottom. Once I have this all setup, I'll report back with more pics and info before taking everything apart and moving it to a 2 Liter setup, and, hopefully, reporting back to write up a full blown diy project.

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Old 02-25-2009, 09:08 PM   #35
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What "I Hope" the finished product will look like:

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Old 02-25-2009, 09:56 PM   #36
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Not to harsh your buzz, but these are 2 liter bottles that you're going to start oxidizing as soon as you pump in air. They're not too heavy to lift, and that's only 4 pints of beer.

What's the real advantage over just treating it like a regular soda bottle and pouring the 4 glasses of beer? Is it to try to avoid stirring up the sediment, or just for fun? (fun is a reasonable answer)
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Old 02-25-2009, 09:57 PM   #37
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After sitting for three hours the psi has dropped down to 10 psi, which is obviously not good. I'm gonna try to find some 3/8" compression fittings to use instead of the tape method, which I assumed wouldn't work from the start, but had to try anyway for experimenting sake. It's looking more and more like I'm gonna have to shell out the $10 to make this legit.
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Old 02-25-2009, 10:04 PM   #38
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SumnerH, while the main reason for doing this is just for fun...I do have a few other reasons. The 2 and 3 liter caps are interchangeable, so eventually I want this to be a 3 Liter system, which is just short of a gallon, which equals 9 - 12oz bottles, or when served into 8oz cups equals 13 servings. I want to be able to take 5 or 6 different 3 Liter bottles of beer, stick them in a cooler, and serve them up one at a time amongst myself and my disc-golfing buddies while playing a course. The only problem with just pouring them out is that while I drink waaay too fast, my wife drinks waaay too slow, and everyone else is somewhere in between. So at some point the wife would be complaining that she's not getting her fair share and blah blah blah she's got another black eye(just kidding). But again, this is mainly just for fun.
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Old 02-26-2009, 02:14 AM   #39
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Quote:
Originally Posted by pizzaman View Post
My second attempt after much more thought has produced a working result. It's not pretty, but it is cheap and effective. I took the schrader valve I had, stripped the rubber off the metal core, and wrapped it in threading tape. Then I inserted it into a short piece of 3/8 tubing, wrapped the tubing in a thin strip of duct tape covered with threading tape. The tube is inserted in a water bottle cap with enough room left for one more tube of equal size to be inserted in the same cap. To my surprise, the water bottle held 20 psi with no leaking. My next purchase will be a picnic tap which I will attach to a second tube attached to the lid next to the schrader tube in the same way, with the tubing running straight to the bottom. Once I have this all setup, I'll report back with more pics and info before taking everything apart and moving it to a 2 Liter setup, and, hopefully, reporting back to write up a full blown diy project.

Switch valve stems to a all metal truck tire stem. It has a nut to hold it on from the outside. The inside is a flat base that is rubber coated so it will seal against the inside of the cap when the outside nut is tightened down. Maybe I missed it but why all the extra work to add a faucet when you can unscrew the cap and pour a beer? 2L is only about 4 pints. Most people would kill that in 1-2 hours.
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Old 02-26-2009, 02:47 AM   #40
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I've looked everywhere for those metal stems and can't seem to find one locally. I tried lowe's, home de-pot, ace, even autozone.

As far as your question, aside from the 10 different reasons I've given in previous posts, I just thought of another one. My *ahem* brewing method is 1 week in primary and 1 week in the bottle. Scoff and curse all you want but it works and it's damned fine beer. The only downside is the thick layer of sediment in the bottom of the bottles. I've tried different yeasts to counteract this, but they all affected the taste. I've tried racking to secondary, but then I have to wait another 2 months before it's drinkable, and is not any clearer and doesn't taste any better than my 2 week start to finish method, there's just less sediment. So, with all that said, I need a cheap, homemade way to dispense beer into peoples cups without disturbing the sediment, which means no moving of the bottle, and especially no pouring. Combine that with all my previous responses and you've still only really got a half-assed answer so once again my real reason for doing this is the same reason I make my own beer in my bathtub.

Because I want to and I can.
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