Everything You Need To Know About CO2 Tanks/Cylinders

One of the main benefits of SeltzaHub is that you can use a variety of CO2 tanks for carbonating your water at home. You are not locked into a single size. As a result we get a lot of questions about CO2 tanks. Here are some common questions that will teach you everything you need to know about CO2 tanks/cylinders.

Where can I buy, refill, or exchange CO2 tanks/cylinders?

You can buy CO2 tanks/cylinders from various suppliers depending on your location and intended use. Here are a few options:

  1. Local welding and gas suppliers: These suppliers typically sell CO2 tanks/cylinders and can refill them for you. You can search online for "welding supplies near me" or "gas suppliers near me" to find a local supplier.

  2. Beverage suppliers: If you're using CO2 for carbonating beverages or dispensing beer, beverage suppliers may also sell CO2 tanks/cylinders. Some examples include Beverage Factory and KegWorks.

  3. Online retailers: Many online retailers sell CO2 tanks/cylinders, including Amazon, Home Depot, and Walmart. However, keep in mind that some retailers may not be able to ship CO2 tanks/cylinders to certain locations due to shipping regulations.

When purchasing a CO2 tank/cylinder, make sure to check the size and specifications to ensure it is compatible with your intended use. Also, be sure to follow proper safety guidelines when handling and storing CO2 tanks/cylinders.

What are the dimensions of a CO2 tank?

Here is a table with common sizes and specifications for CO2 tanks/cylinders:

CO2 Tank Size Diameter (in) Height (in) Empty Weight (lbs) Full Weight (lbs)
2.5 lb 3.14 14.2 3.7 6.7
5 lb 5.25 18.2 7.5 15.5
10 lb 7.0 20.5 14.0 24.0
15 lb 7.0 29.0 20.0 32.0
20 lb 7.0 27.2 24.0 36.0
35 lb 7.0 34.0 43.0 61.0
50 lb 9.0 55.0 55.0 98.0


Note that the dimensions and weights may vary slightly depending on the manufacturer and model. It's always best to check with the specific manufacturer or supplier for exact measurements and specifications. 

What size CO2 tank should I buy?

Please refer to the dimensions above and measure the available space under your counter. Please note the CO2 tank can go 15 feet from your Seltza Hub so you can place it in a separate counter or drill through the floor to store it in the basement.

Is CO2 safe to store in the home?

Here are some tips for safely storing CO2 in the home:

  1. Store CO2 tanks/cylinders in a cool, dry, and well-ventilated area. Avoid storing them in areas with direct sunlight or extreme temperatures.

  2. Keep CO2 tanks/cylinders away from open flames, electrical equipment, and other sources of heat or ignition.

  3. Make sure the CO2 tank/cylinder is properly secured and upright at all times. This can help prevent the tank/cylinder from falling or tipping over.

  4. Always follow manufacturer instructions for handling and storing CO2 tanks/cylinders. This may include using a regulator to control the flow of CO2 and wearing personal protective equipment when handling the tanks/cylinders.

  5. Do not attempt to refill or modify CO2 tanks/cylinders yourself. This should only be done by trained professionals.

  6. If you suspect a CO2 leak or feel dizzy or lightheaded, immediately leave the area and seek fresh air. Contact emergency services if necessary.

Overall, as long as proper safety precautions are followed, CO2 can be safely stored in the home for a variety of purposes such as carbonating beverages, dispensing beer, or powering pneumatic tools.

How do I check for leaks in my CO2 tank/canister?

Checking for leaks in a CO2 tank is important for safety and to ensure that the tank is functioning properly. Here are some steps you can follow to check for leaks in a CO2 tank:

  1. Check for physical damage: Inspect the tank visually to check for any physical damage such as dents, cracks or other signs of wear and tear. Damaged tanks should not be used and must be replaced.

  2. Listen for hissing sounds: Listen for any hissing sounds around the valve, regulator or hose connections. If you hear hissing, this could indicate a leak.

  3. Use a soap and water solution: Mix a solution of water and dish soap in a spray bottle. Spray the solution onto the valve, regulator, and hose connections. If you see bubbles forming, this indicates a leak.

  4. Use a leak detector solution: You can also use a commercial leak detector solution that is specifically designed for CO2. Apply the solution around the connections and watch for bubbles.

  5. Check the pressure gauge: If the pressure gauge shows a drop in pressure over time, this could indicate a leak.

If you detect a leak, stop using the tank immediately and take appropriate safety measures. Tighten any loose connections, replace damaged parts, or seek professional assistance from a trained technician. It's important to handle CO2 tanks with care and follow manufacturer instructions to ensure safe operation.

Is carbonating drinks bad for the environment?

Carbonating drinks itself is not necessarily bad for the environment. However, the production and disposal of the CO2 used for carbonation can have negative environmental impacts if not managed properly.

CO2 is a greenhouse gas that contributes to climate change, so it's important to ensure that the CO2 used for carbonation is produced and delivered in a sustainable and environmentally responsible way. Some suppliers of CO2 use sustainable methods such as capturing and reusing CO2 emissions from industrial processes, or sourcing CO2 from renewable sources like biogas.

Additionally, the disposal of empty CO2 canisters or tanks can also have negative environmental impacts if not handled properly. These canisters should be recycled or properly disposed of at a hazardous waste facility to avoid potential leaks and environmental contamination.

So while carbonating drinks itself may not be inherently bad for the environment, it's important to consider the environmental impacts of the entire carbonation process, from production to disposal.

What’s the best way to get cold, on-demand seltzer water at home?

One of the main design features of SeltzaHub an SeltzaTap are the ability to attached the CO2 tank of you preference. Seltza products allow you to carbonate you own water straight from you own tap that includes a refrigerated tank for cold on demand sparkling water.