How long will a 5lb co2 tank last

To use this CO2 Calculator, simply input the dimensions of your room. Our tool makes a few assumptions: The ambient CO2 level is around 300ppm. The target CO2 level is around 1500ppm. You will add CO2 for 15 minutes every hour. After you put in your dimensions, you'll see your calculated CO2 flow rate in green.

hooha. It's probably easier/more affordable getting a 5lb tank. If you're going to go high light, you will probably use more C02 eventually as well. A 5lb tank on my 55 lasts about 4-6 months. I got a 2.5lb tank for a 20 gallon and if I remember correctly it's cost was close to a 5lb tank (got it for space concerns).Co2 is sold by weight, not volume. If you stick the cylinder in the fridge, it might show 500 psi. If you take it out, it might show 800 psi. So, that gauge is meaningless. It'll show "order co2" until the tank is more than 90% empty, and then go immediately to "empty" as co2 is a liquid, but is dispensed as a gas.Conclusions and Rules of Thumb. Rule of thumb for estimating weight of CO2 in a keg - 1/2 gram per gallon per PSI. Purging a 5 gallon keg will take at least 36.75 grams of CO2 (14.7 x .5 x 5). Practically speaking it will take more. Weight of CO2 Used to Carbonate = Volumes of Carbonation x 14.7 x .5 x Volume of Beer.Feb 8, 2018 · I have bought this CO2 tank back in 2015 and its still running 24/7. How long it will last .... ? I don't know yet. Watch this video for a simple solution to solve the problem of a toilet tank lid that doesn't fit properly. Expert Advice On Improving Your Home Videos Latest View All Guides Lates...I average 5 to 7. Although I don't always have a keg hooked up to the tank will drinking on it. Usually wait till barely any beer comes from the tap then hit it with …

General Planted Tank Discussion. Help with my C02 Please. 1353 Views 12 Replies 6 Participants Last post by d2creative, Mar 9, 2020. d2creative Discussion Starter ...A 20lb propane tank contains 430,000 BTU. To determine how long it will last on a firepit, you divide the figure by your fire pit's BTU rating. For instance, the Endless summer firepit would last for; 430,000/50,000-=8.6 hours with the 20ln propane tank. You can get more usage time from your 20lb tank by reducing or keeping the flame low this ...CO2 intermolecular forces are sources of attraction between atoms of carbon and oxygen that cause them to join and form carbon dioxide. The action of intermolecular forces must be ...if you fill less than 5 gal of beer into the 5 gal corny keg, it will take more CO2 under the above bullet point and less CO2 under the next bullet point. finally, it takes a further ~ 1.67 units to serve 5 gal of beer at 10 psi. So we can purge, transfer, carbonate, and serve around 8-10 kegs with a full 5-lb tank. Reply.I'm completely new at this, so please bear with me. I have a 5lb Co2 cylinder on order, but I have a few questions. ... 1. How long does a 5lb tank last for a 29 gal.? 2. Which regulator is the best, Milwaukee, or JBJ? 3. When should I refill the tank (Psi)? Thanks in advance. Lissette . R. reiverix Aye. Sep 4, 2004 1,470 0 0 55 …How Long Do CO2 Tanks Last on Average? Estimating how long your CO2 tank will last on average is based primarily on the size of the keg involved. As a baseline, know that you can use a 5-pound tank of CO2 to dispense about 6 to 8 kegs. You can calculate the length of time according to how much beer or other beverage you pour.How long does a bottle of c02 last? I have a 5lb bottle, set at 12 psi thru a clippard needle valve thats always open. The shop that fills the tank only fills it to 800psi. ... Use windex or dish soap and water in a spritzer bottle to check your CO2 tank, regulator, solenoid, bubble counter ect ect for leaks after you put it together. Mark.On average, a standard 5-pound CO2 tank can last for about 5-8 half-barrel kegs. If you use your kegerator frequently, you may need to refill the CO2 tank every 2-3 months. ... How Long Does A 5Lb Co2 Tank Last In A Kegerator. What Co2 Pressure Should You Set For A Kegerator. 9 Unbelievable Kegerator Co2 Regulator For 2024.

Is hard to tell how long it will last is all depend how much you gonna use and how stable your water be and what size is your tank plus how heavy is planted. I have 18 tanks and I average anywhere from 2-4 months on 5.lb refill, some tanks I have 20.lb and they last up to half year .. Advertisement.Attach the fill station to your CO2 tank. Firmly attach the paintball tank to the fill station. Rotate the bulk tank's primary valve to start the airflow. Open the station's valve, let the air in the tank until it fills with CO2. And that's it your tank is filled, and you are good to go to play on the battlefield.FAQs: How Long Does a CO2 Tank Last in a Grow Room? 1. How long does a CO2 tank last in a grow room? The duration of a CO2 tank in a grow room is based on the size of the tank and the size of the grow room. A small CO2 tank can last for around 2-3 weeks in a smaller grow room, but a larger tank can last up to 3 months. 2.A 5lb Cylinder of CO2 will dispense roughly 8 (eight) 1/2bbl kegs, or about .6 lbs required per 1/2bbl with nominal dispensing conditions. If you ran a 5lb tank out with one keg, you have a leak. Do some searches for leak testing procedures, and do the soapy water thing and look for bubbles.As the world becomes more conscious of the impact of climate change, it’s essential to take steps towards reducing your carbon footprint. One major way to do this is by monitoring ...

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A rough estimate to start from would be, for every half pound of CO2, you can dispense a will dispense a full size (1/2BBL / 15.5G) keg. Which would also equate to about 3 - 5 Gallon kegs. If you are force carbonating you would use about double the amount of CO2 to force carbonate and then dispense the keg – 1 pound of CO2 to force carbonate ...Welding Time. 15 CFH. 1 hour 20 minutes. 20 CFH. 1 hour. 25 CFH. 48 minutes. Your with 20 cubic foot of Argon should last you an hour. When you've opened your gas valves and you're running your Argon shielding gas at a rate of 20 CF.Aug 10, 2022. #5. I have a 55 gallon tank and a 5 # tank of CO2 lasts me about 4 months. You should get 6-7 on a 29 gallon tank. You should be able to get away with only one tank if you can get it refilled easily. If refills are inconvenient,. then having a second tank might be warranted. I understandd that there is currently a shortage of CO2 ...Welding Time. 15 CFH. 1 hour 20 minutes. 20 CFH. 1 hour. 25 CFH. 48 minutes. Your with 20 cubic foot of Argon should last you an hour. When you’ve opened your gas valves and you’re running your Argon shielding gas at a rate of 20 CF.From $9.93/mo with. View sample plans. Quantity. Add to cart. Add to Wishlist. CO2 Bottle (2.5lb) 25-10006. New Aluminum 2.5lb CO2 Bottle with valve. This bottle is 4 3/8" diameter which is standard for 2.5lb CO2 bottles. ***Note: these bottles are only date certed.

Popular Welding Gas Bottle Sizes for MIG and TIG. There are many size gas MIG/TIG tanks on the market. But the three main sizes a homeowner, or hobby welder will most likely use is the 40, 80, or 125 cubic feet ("cf") tanks of Argon or MIG gas mixture (75% Argon, 25% CO2). The largest of the three sizes provides plenty of use time without ...Aim to fill the 5 lb CO2 tank to its recommended pressure, which is typically around 800-900 psi (pounds per square inch). Be patient and fill the tank slowly. Rushing the filling process can lead to overfilling or potential safety hazards. Continue to monitor the pressure gauges as you fill the CO2 tank.You still fill to the same level, but when the tank is cold less of the liquid CO2 converts to gas while it is being filled so you can get more in on the first attempt at filling. Source: I worked in a paintball store for 3 years and literally filled thousands of CO2 tanks, including some of the 5lb tanks used for kegerators.what this means to you though, is if you find a tank used (and i recommend you do! such as on craigslist or ebay - but check for shipping costs), always ask for the …How would you hide a 5lb CO2 tank for a 20 gallon high aquarium? Jump to Latest Follow ... And a 5lb cylinder under my 20g tank. Save Share. Like. 0 Reply. thinBear. 288 ...I've been using a 5lb CO2 tank with my drinkmate for a few months now, I've probably gone through 10 or so tanks with no issues. I just switched over from my brewery (which closed) to an Airgas for the Co2 exchanges and noted on my first tank that my Drinkmate now just releases CO2 as soon as I open the tank and not when I press the Drinkmate button and the only way to stop it is to shut off ...How Much Co2 Does A 5 Lb Tank Hold? A 5 lb tank can hold approximately 9. 3 cubic feet or 262 liters of CO2. Conclusion. Overall, understanding how many tires a 5lb Co2 tank can fill is an important consideration for anyone using this type of equipment.I just emptied my CO2 tank and it's only been a year… I have a 20# tank, 3 - 5 gallon kegs, and a 2 1/2 gallon keg I use for soda water. ... How long does your CO2 tank last? Kegging. lowflyingbrews January 7, 2015, ... I have a 5 lb on the fridge and a second seperate 5 lb for carbing. Both get filled roughly once a year. brew_cat March 8 ...i've had my 5lbs running for over a little over month now at about 1.5 bps on a 10g and the gauge hasn't changed at all. according to my dad, who built the co2 system, it will last well over a year. one thing to note though, is that it costs about the same to fill a …

Rather than waiting till you completely run out, it is good to know how many kegs can be dispensed per CO2 tank to know when the best time to refill is. 3. How many kegs can I dispense before needing to fill my CO2 tank? If you’re using a 5lb. CO2 tank, you can dispense 2 to 4 full-sized kegs before having to refill.

Join Date: Oct 2006. Posts: 1629. Share. Tweet. #2. 01-01-2006, 05:11 AM. Your bottle will be rated a certain "cubic feet" volume. That bottles useful life per fill is directly proportional to the amount of flow you have set at the regulator. If you have an 80cf bottle of gas, and you're regulating it to 10cf/h, then that bottle will last 8 ...This dependable 5 lb aluminum CO2 air tank provides the right amount of pressure to your gas lines. Made of high-strength aluminum alloy, this CO2 air tank is lighter than steel and will not rust. Measuring 18 inches tall and 5.25 inches wide, the CO2 cylinder holds up to 5 lbs of CO2, which will last for roughly 5-7 half kegs.If your looking for a rough number. 5lb tanks average about 3 months. 10lb tanks average about 6 months. 20lb tanks average about s year. My 5 lb tank running both my 20 high and my 46 bowfront lasts about 3 months maybe just a hair less.I'm using the glass Ada bubble counters. So smaller bubble.A rough estimate to start from would be, for every half pound of CO2, you can dispense a will dispense a full size (1/2BBL / 15.5G) keg. Which would also equate to about 3 - 5 Gallon kegs. If you are force carbonating you would use about double the amount of CO2 to force carbonate and then dispense the keg - 1 pound of CO2 to force carbonate ...6. If all your seals are airtight a 5 pound tank should last you many kegs. Too many for me to keep count. Bad gaskets, improperly seated poppets and bad hose connectors or clamps cause small leaks that will drain your CO 2 in no time. Some keggers only connect the gas line to the keg when it starts to peter out. Tight seals are the key.You still fill to the same level, but when the tank is cold less of the liquid CO2 converts to gas while it is being filled so you can get more in on the first attempt at filling. Source: I worked in a paintball store for 3 years and literally filled thousands of CO2 tanks, including some of the 5lb tanks used for kegerators.5 lb. Aluminum Co2 Tank Compressed Gas Air Cylinder 313. $9275. 0:45. VEVOR CO2 Regulator Gauge with 0-60PSI, Heavy Duty CO2 Gauge Gas System, Draft Beer Regulator with Check Valve, Adjustable Pressure Regulator for Draft Beer Homebrew (5 LBS CO2 Tank) 20. $6999. 3:38. 20 lb CO2 Tank New Aluminum CGA320 with SIPHON TUBE by Beverage Elements 184.the real danger comes from a valve stem getting knocked off or broken. The reason why it is safer to transport vertically is that under pressure, CO2 is a liquid and inside the tank at the top near the valve stem a "cushion" or buffer zone of warmer gas rests between the liquid CO2 and the valve. constant contact between the supercooled liquid ...

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How long your welding gas cylinders will last depends on the gas flow rate. A cylinder with a capacity of 80cf will last about 4h if the flow rate is set at 20cfh. In comparison, a 125cf cylinder will last 12.5h if you use a flow rate of only 10cfh. Estimating how much gas you have left depends on the gas type but it’s fairly easy to do.Well, I dont have a 120 gallon tank, but I have 2, 29 gallon tanks and a 20 high that were all being fed by a 5 pound tank and I was having to swap out every 6 weeks at $38.00 per exchange. I traded in the 5 pound tank and upgraded to a 20 pound when I discovered the 20 pound tank only cost $48.00 to exchange.Welding Time. 15 CFH. 1 hour 20 minutes. 20 CFH. 1 hour. 25 CFH. 48 minutes. Your with 20 cubic foot of Argon should last you an hour. When you’ve opened your gas valves and you’re running your Argon shielding gas at a rate of 20 CF.The best method to measure co2 is through ph drop. Bubble counters do not tell you how much co2 you have in your tank. What works in my 6g tank might gas your inhabitants in your 40g. And size of bubbles are drastically different depending on pressure as well as diffuser. Everyone's setup is different. I'm emptying 5lb bottle every 4 months.The date of manufacture, commonly known as the "Born On" date, is expressed numerically in a mm/yy format. The tank must be hydrotested every five years after this date. The next number indicates the tank's total capacity of liquid CO2. The last figure on the third row beginnig with "TW" is the tare weight of the tank expressed in pounds.Join Date: Oct 2006. Posts: 1629. Share. Tweet. #2. 01-01-2006, 05:11 AM. Your bottle will be rated a certain "cubic feet" volume. That bottles useful life per fill is directly proportional to the amount of flow you have set at the regulator. If you have an 80cf bottle of gas, and you're regulating it to 10cf/h, then that bottle will last 8 ...Location. Worcester. 4 Aug 2011. #9. To give you some idea, I have a 500gram co2 canister running at 1 bubble per second and it normally lasts about 3 and a half months. So in your tank with such high lighting and tank size would probably last you about a month or less.The area around the tank and cylinders should be well-ventilated if possible and should be monitored by a CO2 safety alarm. CO2 tanks and cylinders should be stored in areas with a temperature less than 125F (51.7C). CO2 tanks and cylinders should always be connected to a reducing valve or regulator with a pressure safety valve. ….

Enhancing the CO2 levels in your indoor grow area can transform plant growth, development, and ultimate yields. While nature caps ambient carbon dioxide at around 400 ppm outside, grow rooms provide a unique opportunity to supply the fuel plants crave by adding concentrated CO2 up to 1500 ppm. Unlocking this heightened capacity for ...We may earn a commission for products purchased through links on this pageThe area around the tank and cylinders should be well-ventilated if possible and should be monitored by a CO2 safety alarm. CO2 tanks and cylinders should be stored in areas with a temperature less than 125F (51.7C). CO2 tanks and cylinders should always be connected to a reducing valve or regulator with a pressure safety valve.At a gas flow rate of 20 ft3/hr (standard small MIG gas flow rate, give or take a little bit), a 20 ft3 tank will last one hour. The 80 ft3 tank will last 4 hours. To get 8 hours of arc time from that 20 ft3 tank, you'll have to refill it -another- 4 times. Drive back to the LWS, refill/exchange the tank, drive home. How Long Does A Co2 Tank Last - Co2 Size Chart Here we’re discussing in GREAT DETAIL, and over delivering with info, how long a co2 tank lasts.We go into de... A typical 5lb. CO2 tank can dispense between 2 to 4 full-sized kegs, depending on the ambient temperature. The colder the ambient temperature the closer you will get to 4 kegs. It takes approximately 1/2 lb. of CO2 to dispense a 1/4 barrel of beer. Depending on what size keg you will be dispensing and what size CO2 tank you purchase, you can ...This tank is one of our best and most popular portable cylinders. Being a 5 lb. CO2 tank, it weighs far less than steel and still has more than enough capacity ...How Long Does A 5Lb Co2 Tank Last In A Kegerator. What Co2 Pressure Should You Set For A Kegerator. 9 Unbelievable Kegerator Co2 Regulator For 2024. ... How Long Does A Co2 Tank Last On A Kegerator. By: Sophia Turner • 100 Best Kitchen Furniture To Make Your Cooking Hassle-Free.Read the tank's label to determine weight (60L is around 438grams). Grab a wrench and unscrew the top (slowly to let any excess gas leak out). Use kitchen scale to measure empty tank (around 500 grams with the top valve removed). Fill with dry ice (I use a 3D printed funnel to help), use kitchen scale to weigh the tank as you add more dry ice ... How long will a 5lb co2 tank last, i've had my 5lbs running for over a little over month now at about 1.5 bps on a 10g and the gauge hasn't changed at all. It won't change at all. Not until it's within a week of being bone dry. And at 1.5bps, a 10g tank will probably last close to a year, give or take a few months, depending on a lot of stuff. Share., At STP ~44 grams (one mole) of CO2 will occupy about ~22.2 liters of volume. a proper 5lb co2 fill has about 50 moles of CO2 gas. This works out to about 1100l of CO2 at STP. Working at STP, a 2 volume batch of beer will use approximately 46l of CO2. That yields a theoretical value of 46 kegs per fill for force carbing., "Ok, that makes sense, is your 100 lb tank's output on the bottom, so that it is filling liquid" "No, it doesnt need to be. CO2 is CO2." I tried to explain to him that if you are only pressing gas into the the smaller tank, CO2 will stop when the pressure equalizes, not guaranteeing that the 5 lb tank will be full., I have a small area 4ftx4ftx6.5ft grow tent. Im running 8 plants in flowering how long will a 10lb co2 tank last? I was thinking about getting one since my grow is small.I will be using a titan regulator with it., Septic tanks are a great way to manage wastewater and sewage in rural areas where there is no access to a municipal sewer system. While septic tanks are an effective solution for w..., CO2 is CO2, there is no food grade CO2. My welding shop traded my 5 pound tank for a 20 pound and refills are $12. Refill costs are pretty much all labor, here are the prices for my tanks: 2 pound-$6 10 pound-$11 20 and 35 pounder(an odd size they traded me for one of my 20 pounders)$12 50 pound-$20, I just emptied my CO2 tank and it's only been a year… I have a 20# tank, 3 - 5 gallon kegs, and a 2 1/2 gallon keg I use for soda water. ... How long does your CO2 tank last? Kegging. lowflyingbrews January 7, 2015, ... I have a 5 lb on the fridge and a second seperate 5 lb for carbing. Both get filled roughly once a year. brew_cat March 8 ..., Off the top of my head, i'd say about a month. If this is one of those 'disposable' cylinders with the little adapter to thread it in to, you can always look at getting a 'paintball' co2 tank and hooking that up with a 'remote line' and a thread adapter. The reason i suggest this, is that a 20oz CO2 tank fill will usually cost you about $6-8 ..., An average human exhales around 2.3 pounds of CO2 in a day. That rate increases by up to a factor of eight during heavy physical exertion and falls somewhat during periods of relax..., Less efficient diffusion typically means wasted CO2 gas escaping, and therefore you need to supply more. I have been using a 5lb tank, making LOTS of mistakes as I learn and experiment. I've had a 5lb last as little as a week (leak in DIY bubble counter) on a 5.5g tank, and up to a month on a 20-long (slow leak in tube going to diffuser)., See full list on content.kegworks.com , It depends on the DOT cylinder type (for U.S. tanks) not the manufacturer. A 5# aluminum cylinder should be a 3AL2015 and is supposed to weigh 7.6 lbs plus the valve weight. A 10# aluminum weighs 12.9 lbs. It should also be approx 800 psig when full. A 5# steel tank weighs 12lbs., 2.5-5 lb. cylinder for 20-gallon aquariums or smaller; 5 lb. cylinder for 25- to 40-gallon aquariums; 10 lb. cylinder for 55-gallon aquariums or larger; If you plan on using one regulator with five or six aquariums, then scale the CO 2 cylinder size accordingly. For more information on CO2 systems in high tech planted tanks, read the full ..., How long will a 5 lb., 10 lb., and 20 lb. CO2 tank last? What does the carbonator do? Search for: Recent Posts. New Website Just Launched! SodaParts on DIY Network; A Brief History of Soda; Environmental Benefits of Soda Fountains; Archives. December 2015; April 2012; October 2011; June 2011;, The 100% CO2 gas cylinders used for MIG welding differ from MIG blends or an Argon tank. What to know: CO2 tanks use different valves so you’ll need an adapter. CO2 tanks are filled by weight, instead of volume. One pound of CO2 provides 8.741 cf of shielding gas. Freezing can damage a regulator not rated for 100% CO2., A 5lb tank of CO2 will last for 15-20 5-gallon kegs of beer. There's no easy apples-to-apples comparison (soda is more highly carbonated than beer, and I'm not sure of the effect on efficiency from carbonating such small batches), but any way you work it paying $15-20 for a refill is a much better deal than paying for SodaStream cartridges., Specific Aspects of a Planted Tank. Equipment. How long would a 5lb can last on a 45g? 1675 Views 18 Replies 14 Participants Last post by oldpunk78, Oct 18, 2011. R. redfishsc Discussion Starter ..., Smaller tanks, such as 2.5 lb or 3 lb tanks, are often used for portable kegerators or for smaller keg sizes. Larger tanks, such as 50 lb or 100 lb tanks, are primarily used for commercial applications. When selecting the size of your CO2 tank, consider your usage frequency, keg size, space constraints, and portability needs., Join Date: Oct 2006. Posts: 1629. Share. Tweet. #2. 01-01-2006, 05:11 AM. Your bottle will be rated a certain "cubic feet" volume. That bottles useful life per fill is directly proportional to the amount of flow you have set at the regulator. If you have an 80cf bottle of gas, and you're regulating it to 10cf/h, then that bottle will last 8 ..., These tanks are rated by the volume of liquid CO2 the tank contains. The smallest paintball CO2 tank is 30 grams and the largest is 20 ounces. Refillable CO2 tanks are made of aluminum. Any tank with a capacity of more than 9 ounces of CO2, or any tank over 2 inches in diameter, must be hydrotested every 5 years to ensure its integrity., Hi! I bought a 5lb co2 tank and im using a carbonator cap to carbonate sodas. One guy told me it could make about 1500l of carbonated drink, but i think that sounds a bit high for a small 5lb tank. I would really want somebodys opinion on this. Thanks in advance, May 3, 2018 · In general, a half pound per quarter keg, 1 pound per full keg. You should get 15-20 sixth kegs out of 5 pounds. A back up bottle is the best thing to do because what your tank gauge is telling you is the pressure of the gas above the liquid CO2. Once the liquid is gone, the pressure will quickly drop and you will be out. , CO2 check valve. Prevent aquarium water to flow into the CO2 cylinder. CO2 tubing. Connect the regulator to the diffuser. CO2 diffuser. Create CO2 micro bubbles in aquarium, allow more CO2 to dissolve in water. We will use our ANS Professional CO2 System to demonstrate the setup., A 20lb propane tank contains 430,000 BTU. To determine how long it will last on a firepit, you divide the figure by your fire pit's BTU rating. For instance, the Endless summer firepit would last for; 430,000/50,000-=8.6 hours with the 20ln propane tank. You can get more usage time from your 20lb tank by reducing or keeping the flame low this ..., Welding Time. 15 CFH. 1 hour 20 minutes. 20 CFH. 1 hour. 25 CFH. 48 minutes. Your with 20 cubic foot of Argon should last you an hour. When you've opened your gas valves and you're running your Argon shielding gas at a rate of 20 CF., Your cylinder should last long, like a year or longer. A really long time. I have a 10 lb tank. I used it for a keg of beer, probably depleting about 1/4 to 1/2 of it, and have been using it on my planted tank for a year and a half now. I still have decent pressure, and I'm assuming it will last a fair bit longer., A CO2 tank with a 5lb capacity can typically dispense roughly 6-7 full-sized kegs before it needs to be refilled or exchanged. However, the exact number of kegs a tank can dispense will depend on a variety of factors, including the temperature of the keg you are dispensing from, the temperature of the environment, the size and type of faucet used, and the size …, In this video I'll unbox a new Sodastream JET and walk you through connecting an external 5lb CO2 tankAmazon Links:Sodatream Hose:https://amzn.to/4112TE7Soda..., Look for a welding supply store. You can pick up a 5lb bottle for $50ish most the time. Refills are usually only $10ish. It'll last you months on a 20 long and the regulators for change 320 style tanks are usually way better quality., Specific Aspects of a Planted Tank. ... 5Lb Co2 for two 20 Gallon tanks. Jump to Latest Follow ... 4 participants last post by xmas_one Feb 27, 2013. O. owens81jw ..., We may earn a commission for products purchased through links on this page, In today’s world, where environmental concerns are at the forefront of discussions, it has become increasingly important for individuals and businesses alike to measure and reduce ..., It will take about 1/2lb of CO2 to dispense a 1/4 barrel keg (7.75 gallons) and about 1/3lb CO2 to dispense a 5 gallon keg (corny keg / sixtel). Refer to the chart below to approximate the number of kegs that can be served from different size CO2 tanks. Keg Size / Style. 20oz Cylinder. 1.5 lb Cylinder. 2.5 lb Cylinder.