Austin · Texas
Every CO2 supplier we could find in the Austin area (Texas) was checked one by one, and 13 of them made the list. 5 will refill the cylinder you walk in with. 4 only swap it for a different tank, which matters if yours is new or an odd size. 4 would not confirm either way, so those are marked call to confirm rather than guessed at. 3 confirm food grade CO2 for anything you actually drink; the common sizes here are 5lb, 20lb, all CO2 tank sizes supported by park equipment; most cover soda, homebrew, welding.
Last checked September 2026
613 Chicon St · Austin, TX 78702
Hours Mon-Fri 07:00-17:00
Official current site verifies the Austin location, hours, phone, and industrial gas business. Recent August 2026 Austin community evidence reports an onsite same-cylinder 5 lb CO2 refill for about $18. No reliable public email or food-grade designation was verified.
3300 Guadalupe St · Austin, TX 78705
Hours Mon-Thu 10:30-21:00; Fri-Sat 10:30-22:00; Sun 12:00-17:00
Official current site verifies the active store and explicitly advertises CO2 alongside its keg business. Recent July and August 2026 Austin community evidence confirms same-cylinder 5 lb CO2 refills. No reliable public email or explicit food-grade designation was found.
18300 Medina Vista Ln · Jonestown, TX 78645
Hours Fri private parties only; Sat-Sun 09:00-18:00; reservations available 7 days
Official current paintball page explicitly states the park fills all sizes of CO2 tanks. Current official site verifies location, hours, phone, and public email. Exact standardized cylinder weights were not published, so the size field preserves the official wording rather than guessing.
2901 Woodall Dr · Cedar Park, TX 78613
Hours Mon-Fri 08:00-17:00
Current business evidence verifies the active Cedar Park fire-protection company and public service email. Austin-area community evidence specifically reports customer CO2 tank filling at this business. Because the service evidence is not from an official current service page, food-grade status remains unknown.
2000 S I-35 Frontage Rd Suite L1 · Round Rock, TX 78681
Hours Mon-Sat 11:00-19:00; Sun 12:00-18:00
Current local listings verify this active Round Rock aquarium shop. Austin-area community evidence identifies this location as a CO2 refill source for aquarium users. The CO2 service evidence is older than the preferred current window, so moat fields remain conservative and no email is claimed.
11111 N Lamar Blvd · Austin, TX 78753
Hours Tue-Fri 08:00-17:00; Sat-Sun Closed
Official current branch page explicitly lists carbon dioxide and provides a branch-specific email. Recent July 2026 Austin community evidence reports CO2 bottle exchange at the Austin Airgas and discusses 5 lb bottle pricing. Food-grade status was not treated as confirmed for this branch.
127 Trademark Dr · Buda, TX 78610
Hours Mon-Fri 07:00-17:00; Sat-Sun Closed
Official current branch page verifies the active Buda branch, public email, and beverage gas availability. Recent July 2026 Austin community evidence confirms a 5 lb CO2 exchange at this Buda/Kyle-area branch. The official page does not explicitly designate the CO2 as food grade.
2801 Montopolis Dr · Austin, TX 78741
Hours Mon-Fri 07:30-16:00; Sat-Sun Closed
Official current Linde location page verifies this Austin gas and welding branch and publishes a company contact email. Recent July 2026 Austin community evidence reports that the Austin Linde handles CO2 by bottle exchange rather than same-cylinder refill, in the context of 5 lb cylinders.
1400 N Industrial Blvd · Round Rock, TX 78681
Hours Mon-Fri 07:30-17:00
DuPuy Oxygen's current official site verifies the Round Rock branch. Very recent August 2026 Austin community evidence reports 20 lb CO2 tank swaps at this location and notes that it does not fill onsite. No reliable public branch email or explicit food-grade designation was verified.
2309 Investment Dr · Pflugerville, TX 78660
Hours 24 hours
Current local business evidence verifies the Pflugerville physical operation. NuCO2's official current site explicitly supplies certified beverage-grade CO2 and publishes its customer-service email. This is commercial beverage CO2 service; public portable-cylinder refill versus exchange behavior was not established.
8801 Wall St Suite 550 · Austin, TX 78754
Hours Mon-Fri 09:00-17:00
Official current site verifies the Austin location, hours, phone, email, and Carbonic Gas (CO2) as part of its beverage dispensing products and services. The beverage context supports food-grade use, but public walk-in portable-cylinder refill versus exchange behavior was not established.
4007 Prairie Ln · Austin, TX 78728
Hours Mon-Fri 09:00-17:00
Current local business evidence verifies the Austin physical operation. Reliant's official current site explicitly supplies beverage-grade CO2, including high-pressure CO2 cylinders, to beverage customers. The public email is a current reputable corporate contact because no branch-specific official email was found. Portable walk-in refill versus exchange behavior was not established.
3519 E 5th St · Austin, TX 78702
Hours Mon-Fri 08:00-16:30; Sat-Sun Closed
Current business listings and manufacturer-distributor records verify this active Austin MATHESON industrial-gas branch. MATHESON is a current supplier of packaged and bulk carbon dioxide, but branch-specific portable-cylinder refill versus exchange behavior, food-grade status, and public email were not verified.