DIY Carbonator Cap, using Gas Post - Home Brew Forums
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Old 10-06-2011, 01:15 PM   #1
Sep 2010
LONDON, Ontario Canada
Posts: 205
Liked 8 Times on 8 Posts

Use a pop bottle cap, drill 1/2 hole in it, and connect corny gas post to barbed part i bought at lowes for 2.50.

I have tested it up to 120 psi for 24 hrs and no leaks.

Carbonator caps are good for re or over carbonating water, oj, lime juice and beer.

120psi lemon water tastes like alkaseltzer.

Here are some pics of the parts:

If you plan to test high levels of pressure, be sure to wear safety glasses.

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Old 10-06-2011, 01:38 PM   #2
bucfanmike's Avatar
Apr 2010
Posts: 1,015
Liked 27 Times on 24 Posts

very nice. I built mine with tire stems. My way forces me to add an extra hose on my co2 manifold. Yours is much nicer.

Mike in Duluth

Currently on Tap
1. Hefeweizen
2. BM Centennial Blonde
3. LHMS Clone

Next on Tap-Denny Conn Rye IPA
Kegged and aging Ed Worts Apfelwine, Denny Conn BVIP
Fermenters -

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Old 10-06-2011, 04:01 PM   #3
rekoob's Avatar
Feb 2011
Norfolk, VA
Posts: 1,412
Liked 107 Times on 82 Posts

love it. was just thinking what i am going to do with my carbinated water now that i have to fit another keg in it's place. A few of these are in my future unless i empty another keg in the next few days...

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Old 10-06-2011, 05:48 PM   #4
May 2011
Lakewood, California
Posts: 227
Liked 12 Times on 10 Posts

Thanks for this great idea. Those carbonator caps go for $20!! The only thing I would change is that the fitting ought to be stainless since it's going to contact finished beer. I always have an empty keg laying around that I could borrow the post off of. This makes it easy to fill for beer to go. I use a jumper with a beer QD on one end and a gas QD on the other. Just click and fill in a plastic bottle. I'm doing this right away.

Reason: clarity

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Old 10-06-2011, 05:56 PM   #5
h22lude's Avatar
Dec 2010
lincoln, ri
Posts: 2,380
Liked 129 Times on 110 Posts

I bought my carb cap for $15. With the price of a post at $10 and that nipple at $3, I wouldn't be saving much money.

If you have an extra post not being used, this is definitely a good build.

Primary: Galaxy Dry Hopped Fort Point clone

Kegged: Saison

Bottled: S'mores Stout

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