Every CO2 supplier we could find in the Cincinnati area (Ohio) was checked one by one, and 13 of them made the list. 5 will refill the cylinder you walk in with. 3 only swap it for a different tank, which matters if yours is new or an odd size. 5 would not confirm either way, so those are marked call to confirm rather than guessed at. 1 confirm food grade CO2 for anything you actually drink; the common sizes here are 5lb or smaller, up to 20lb; most cover soda, homebrew, welding.
13places listed
5confirmed refill
1confirmed food grade
Last checked September 2026
Sorted for you: places that refill your own tank come first, then the most complete, confirmed listings. Exchange-only and unconfirmed spots follow.
KeyRefillBothExchangeConfirm
Paradise Brewing - Anderson
Refill
7766 Beechmont Ave · Cincinnati, OH 45255
ServiceRefill
Food gradeCall to confirm
Tank sizes5lb or smaller
Your cylinderYes, refills yours
homebrewsoda
Hours Wed-Sat 12:00-22:00; Sun 12:00-18:00; Mon-Tue Closed
Current official business information verifies the active Anderson brewery location, phone, email, and hours. The latest explicit refill evidence located states that Paradise continues filling customer-owned 5 lb or smaller CO2 tanks, with a January 2024 Cincinnati homebrew discussion also identifying Paradise as a refill option. Because the refill evidence is older than the other top entries, this row is retained with that freshness caveat. Food-grade status was not explicitly published.
Hours Seasonal hours; Mon-Fri and Sat open, Sun varies by season; see current contact page
Official current CO2 service page explicitly says Wardway refills customer beverage and paintball CO2 tanks up to 20 lb and can arrange hydrostatic retesting when required. Current official contact page verifies the location, phone, and sales email. Current site pages differ slightly on seasonal hours, so hours are summarized conservatively rather than guessed.
Official current Cincinnati branch page verifies the Blue Ash location, phone, and branch-specific service email. Koorsen's current cylinder guidance covers CO2 tanks used for soda machines and extinguishing systems and states that customers may leave cylinders with a local branch for testing and refilling. Regular public branch hours, food-grade status, and exact sizes were not verified.
5110 Lesourdsville W. Chester Rd · Liberty Township, OH 45011
ServiceRefill
Food gradeCall to confirm
Tank sizesAsk when you call
Your cylinderYes, refills yours
paintball
Hours Sat 11:00-17:00; Sun 13:00-17:00; Mon-Fri Closed
Official current site verifies the active paintball field, physical address, phone, email, and weekend hours. Fresh March and May 2025 Cincinnati-area community evidence specifically identifies Paintball Country as a current place to get CO2 tanks refilled. Exact supported cylinder sizes and food-grade status were not verified.
Hours Office Mon-Fri 08:00-17:00; walk-in service Mon-Thu 07:00-15:30, Fri 07:30-12:00
Official current Cincinnati branch page explicitly tells CO2 fill customers to call ahead for availability and verifies the physical branch, phone, office hours, and walk-in service hours. The email is Silco's official general inquiry address because no branch-specific public customer email was found. Food-grade status and supported cylinder sizes were not established.
Official current branch page verifies the Cincinnati location, branch-specific email, phone, hours, and carbon dioxide availability. Fresh July 2025 Cincinnati community evidence reports that the local Airgas store uses a tank-swap model rather than returning the customer's exact canister. Exact exchange sizes and food-grade status were not verified.
Current business information verifies the physical location, phone, hours, and public sales email. Current local business information explicitly states that Corny Keg supplies carbon dioxide tank exchanges to local customers, and a recent customer review describes receiving a swapped CO2 tank. Same-cylinder refill was not established with equally current evidence, so this row is classified as exchange only.
Current official and BBB information verifies the Bellevue physical location, phone, and customer-service email. Recent Cincinnati community evidence identifies The Party Source as a quick CO2 exchange option for kegerator users. This is classified conservatively as exchange only. Exact CO2 cylinder exchange sizes and food-grade designation were not verified strongly enough for publication.
Official current Cincinnati location page explicitly says this branch supplies carbon dioxide for beverage carbonation and food processing and supports food, beverage, and agriculture customers. That branch-relevant food and beverage evidence supports food_grade=yes. The public page does not distinguish portable-cylinder refill from exchange or publish cylinder sizes. No reliable public branch or general customer email was verified without inferring a pattern.
Official current branch page explicitly lists carbon dioxide at this practical-metro Walton store and verifies the branch-specific email, phone, and hours. The page does not establish portable CO2 refill versus exchange behavior, food-grade status, or supported cylinder sizes, so those fields remain unknown.
Current branch information verifies the Cincinnati physical location, phone, hours, and branch email. Current industry membership information ties this exact Cincinnati operation to AWG's industrial, specialty, beverage-gas, and carbon-dioxide distribution business. Public evidence does not clearly distinguish same-cylinder refill from exchange for portable CO2 cylinders, and no exact cylinder sizes or branch-specific food-grade designation were established.
Hours Mon-Fri 07:00-20:00; Sat 08:00-18:00; Sun 08:00-17:00
Current business information verifies the active hardware store, address, phone, email, and hours. Fresh May 2025 Cincinnati community evidence recommends Engel's in direct response to a request for local CO2 refills and paintball supplies. Because the public evidence does not explicitly say whether the service is a refill or exchange, service_type and accepts_customer_tanks remain unknown rather than inferred.
Official current locations page verifies this Cincinnati site as a Retail Store and Fill Plant. Current company information identifies Wright Brothers as a specialty and industrial gas producer serving beverage and manufacturing customers, with CO2 among company gas specialties. The public evidence does not clearly establish a portable walk-in CO2 refill-versus-exchange workflow, exact sizes, or a reliable general customer email, so the moat fields remain conservative.