Tool

CO2 Cylinder Picker

Pick a tank size that matches your use-case, space, and patience level. This is a simple decision helper now. If people actually use it, we’ll make it smarter.

Use the picker Directory Map Tank sizes guide All tools

If you’re not sure: 10 lb (manageable) or 20 lb (fewer trips, best value for many people).

Fast picks

These are “most people won’t regret it” defaults. Use the picker below if you want it tailored.

5 lb

Tight spaces, lighter to move. Expect more frequent refills/exchanges.

Find exchange Find refill

10 lb

The “safe bet” choice. Manageable weight, solid runtime for most home setups.

Find exchange Find refill

20 lb

Fewer trips and often better value. Heavier to move, needs secure storage.

Find exchange Find refill

Using CO2 constantly?

Consider 50 lb if you have space and want fewer swaps (shop/heavy-use vibe).

Tank sizes guide Runtime estimator

Pick by use-case

Click a use-case, then tweak space + patience to get a sane starting size and what to ask suppliers.

Select a use-case:

Recommendation

Click a use-case above to get a starting size, what to ask suppliers, and the best next directory filter.

Open directory Call checklist

Quick reality checks

Space tight? 5–10 lb.
Hate frequent refills? 20 lb.
Heavy use / shop setting? 50 lb.
New? Exchange is often the easiest path.
Customer-owned cylinder? Ask if they accept it. Policies vary.

Want to sanity-check your choice? Use the runtime estimator and the cost comparator.

Optional gear that prevents dumb problems

Tank strap / mount

Stops tipping and makes storage safer (especially 20 lb+).

View options

CO2 regulator

Match the regulator to your setup (keg, aquarium, etc.).

View options

Adapters

For SodaStream / specialty connections and odd setups.

View options

Some links may be affiliate links. Your price doesn’t change. Disclosure.

FAQ

Should I start with refill or exchange?

If you’re new, exchange is often simpler and faster. Refills can be cheaper but policies vary. Use the cost comparator to decide with real numbers.

Is 50 lb overkill?

For many home users, yes. For heavy use, shops, or “I hate trips” people with space and proper storage, it can be perfect. Secure it upright and treat it like the heavy object it is.

What should I ask suppliers?

Start with: “Do you exchange CO2 cylinders?” and “Do you refill customer-owned cylinders?” If you get a confused answer, use the call checklist.

Ready to find a CO2 supplier?

Browse suppliers and filter by refill vs exchange based on what you prefer.

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