National Homebrew Day Giveaway - Enter Now - Weekend Giveaway!

Home Brew Forums > Home Brewing Beer > Bottling/Kegging > ? about how much Co2 to carb
Reply
 
Thread Tools
Old 06-13-2007, 04:38 PM   #1
Southwood
Feedback Score: 0 reviews
 
Southwood's Avatar
Recipes 
 
Join Date: Jul 2006
Location: Columbus, Ohio
Posts: 176
Default ? about how much Co2 to carb

Hey guys,

How much tank pressure do you usually lose during initial forced carbonation?

I hooked up my gas line to the keg set to deliver 12 psi (set & forget). In the past 4 days my tank pressure has gone from around 900 psi down to around 400 psi. Is this normal, or should I step up my searching for leaks (none obvious).

Thanks for any input!
__________________
Primaries: Centennial IPA
Conditioning: Duseldorf Altbier, '07 Barleywine
On-tap: Dunkelweizen
Also pouring: Weizen-bock, Solstice Ale '06
Southwood is offline
 
Reply With Quote
Old 06-13-2007, 04:49 PM   #2
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
Vendor Ads 
Feedback Score: 3 reviews
 
Bobby_M's Avatar
Recipes 
 
Join Date: Aug 2006
Location: Whitehouse Station, NJ
Posts: 22,549
Liked 1213 Times on 797 Posts
Likes Given: 29

Default

Pressure doesn't drop as CO2 is used. The only thing that can affect tank pressure is temperature. You probably have the tank in your fridge right?

If you had 5 gallons of brew and you're carbing to say 2 volumes, you've used exactly 10 gallons of CO2. I have no idea what that translates to in pounds of liquid CO2 (which is how you'd measure how full a tank is), but it's not much.
__________________
Welcome to BrewHardware.com. I love you.
New 100% Stainless Steel Heating Elements are IN! ULWD 5500w Ripple, 2000w, 1500w, etc
Chugger Pumps, Pump Kits, Camlocks, Sightglasses, Clear USA made Silicone Tubing, RIMS, Electric Install Parts, etc.
Bobby_M is offline
 
Reply With Quote
Old 06-13-2007, 06:37 PM   #3
abracadabra
Feedback Score: 0 reviews
 
abracadabra's Avatar
Recipes 
 
Join Date: Dec 2006
Location: Newnan, Georgia
Posts: 1,925
Liked 6 Times on 6 Posts

Default

I would check for leaks, I use Star-san and brush or spounge it on. Look for bubbles to build.

That tank pressure seems pretty low to start with was it a recently filled tank? And what size tank are you using?
__________________
Do what you like!
Brew what you like!
abracadabra is offline
 
Reply With Quote
Old 06-13-2007, 08:00 PM   #4
Southwood
Feedback Score: 0 reviews
 
Southwood's Avatar
Recipes 
 
Join Date: Jul 2006
Location: Columbus, Ohio
Posts: 176
Default

Quote:
Originally Posted by abracadabra
That tank pressure seems pretty low to start with was it a recently filled tank? And what size tank are you using?
I got a used keggerator off craigslist & the guy threw in the 5 lb co2 tank, it sits outside the unit. It had about 900 psi when I first put the regulator on it.

I've heard that when these tanks start to get low, they run out quick. I was thinking low was below 500, I thought I'd still be good with 900

On my way to the gas store now (right down the street, score!). I'll use your star san technique tonight.

Thanks!
__________________
Primaries: Centennial IPA
Conditioning: Duseldorf Altbier, '07 Barleywine
On-tap: Dunkelweizen
Also pouring: Weizen-bock, Solstice Ale '06
Southwood is offline
 
Reply With Quote
Old 06-13-2007, 08:25 PM   #5
Bobby_M
Vendor and Brewer
HBT_SPONSOR.png
Vendor Ads 
Feedback Score: 3 reviews
 
Bobby_M's Avatar
Recipes 
 
Join Date: Aug 2006
Location: Whitehouse Station, NJ
Posts: 22,549
Liked 1213 Times on 797 Posts
Likes Given: 29

Default

If the pressure drops but the tank temp has remained the same, it means you have no more liquid CO2 in the tank and you're basically empty. However, when CO2 is used quickly, like when applying to an uncarbed corny for the first time, the temp will drop and show a lower pressure. Put the tank on a scale and then subtract the tare weight which is usally stamped into the tank. That's how much liquid CO2 you have left. A 5lb tank would have about 5lbs in it when full and about zero when empty.
__________________
Welcome to BrewHardware.com. I love you.
New 100% Stainless Steel Heating Elements are IN! ULWD 5500w Ripple, 2000w, 1500w, etc
Chugger Pumps, Pump Kits, Camlocks, Sightglasses, Clear USA made Silicone Tubing, RIMS, Electric Install Parts, etc.
Bobby_M is offline
 
Reply With Quote
Old 06-14-2007, 03:42 PM   #6
abracadabra
Feedback Score: 0 reviews
 
abracadabra's Avatar
Recipes 
 
Join Date: Dec 2006
Location: Newnan, Georgia
Posts: 1,925
Liked 6 Times on 6 Posts

Default

Quote:
Originally Posted by Southwood
I got a used keggerator off craigslist & the guy threw in the 5 lb co2 tank, it sits outside the unit. It had about 900 psi when I first put the regulator on it.

I've heard that when these tanks start to get low, they run out quick. I was thinking low was below 500, I thought I'd still be good with 900

On my way to the gas store now (right down the street, score!). I'll use your star san technique tonight.

Thanks!
Sounds like you tank was close to empty to start with is just about empty now. So that's a good call just to go ahead and get it filled. It never hurts to check for leaks though just to be sure. And a tank will empty pretty fast if you have a leak.
__________________
Do what you like!
Brew what you like!
abracadabra is offline
 
Reply With Quote
Reply


Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
force carb vs. natural carb BrewDey Bottling/Kegging 17 01-10-2011 01:57 AM
Edme Extra Stout-to carb or not to carb? dfox Beginners Beer Brewing Forum 2 11-01-2009 08:41 PM
Apfelwein to carb or not to carb?? Hops Cider Forum 8 12-25-2008 04:56 AM
Desired IPA carb level, muntons carb tabs and metric scaling twst1up Bottling/Kegging 5 11-10-2008 10:58 PM
forced carb vs cast carb tgrier Bottling/Kegging 6 12-24-2007 07:13 PM


Forum Jump

Newest Threads

LATEST SPONSOR DEALS