San Diego · California
Every CO2 supplier we could find in the San Diego area (California) was checked one by one, and 17 of them made the list. 11 will refill the cylinder you walk in with. 2 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. 5 confirm food grade CO2 for anything you actually drink; the common sizes here are 10lb, 2.5lb, 20lb; most cover soda, homebrew, welding.
Last checked September 2026
1180 N Marshall Ave · El Cajon, CA 92020
Hours Mon-Fri 07:00-16:00; Sat-Sun Closed
Official branch FAQ explicitly says the store carries beverage gases including carbon dioxide and refills customer CO2 cylinders at the front desk.
679 Enterprise St · Escondido, CA 92029
Hours Mon-Fri 07:00-16:00; Sat-Sun Closed
Official branch page lists beverage gases and a North County Beverage CO2 Account Manager. Its FAQ explicitly says customer cylinders, including carbon dioxide, are refilled at the front desk.
2100 Haffley Ave · National City, CA 91950
Hours Mon-Fri 07:00-16:00; Sat-Sun Closed
Official branch page lists beverage gases, a Beverage CO2 Account Manager, walk-up carbon dioxide purchases, and customer-cylinder CO2 refilling. The nearby 2300 Haffley Ave facility is explicitly non-retail and is not separately listed.
2528 Market St · San Diego, CA 92102
Hours Mon-Fri 07:00-16:30; Sat-Sun Closed
Official branch FAQ explicitly says walk-up customers can buy carbon dioxide and that WestAir refills customer cylinders including CO2. Branch lists Beverage Gases and a Beverage CO2 Account Manager, supporting beverage-grade use.
6060 El Cajon Blvd · San Diego, CA 92115
Hours Daily 09:00-02:00
Official branch page explicitly lists CO2 refills. Keg N Bottle's current CO2 service page says customers bring their own CO2 bottle and it is filled for them, supporting same-cylinder refill classification. Email is corporate/general contact; Email source: https://kegnbottle.com/pages/customers-with-disabilities.
1030 Torrey Pines Rd · La Jolla, CA 92037
Hours Daily 09:00-00:00
Official branch page explicitly lists CO2 refills. Keg N Bottle's current CO2 service page confirms same-cylinder CO2 bottle filling for kegerator customers. Email is corporate/general contact; Email source: https://kegnbottle.com/pages/customers-with-disabilities.
3681 Avocado Blvd · La Mesa, CA 91941
Hours Mon-Thu,Sun 09:00-22:00; Fri-Sat 09:00-23:00
Official branch page explicitly lists CO2 refills. Keg N Bottle's current CO2 service page confirms customers bring their own bottle to be filled. Email is corporate/general contact; Email source: https://kegnbottle.com/pages/customers-with-disabilities.
1827 Massachusetts Ave · Lemon Grove, CA 91945
Hours Daily 08:00-23:00
Official branch page explicitly lists CO2 refills. Keg N Bottle's current CO2 service page confirms customer-owned bottle filling. Email is corporate/general contact; Email source: https://kegnbottle.com/pages/customers-with-disabilities.
2335 Highland Ave · National City, CA 91950
Hours Mon-Thu,Sun 08:00-00:00; Fri-Sat 08:00-02:00
Official branch page explicitly lists CO2 refills. Keg N Bottle's current CO2 service page confirms same-cylinder bottle filling. Email is corporate/general contact; Email source: https://kegnbottle.com/pages/customers-with-disabilities.
16079 San Dieguito Rd Suite A2 · Rancho Santa Fe, CA 92091
Hours Daily 09:00-21:00
Official branch page explicitly lists CO2 refills. The current Keg N Bottle CO2 service page confirms customer-cylinder filling. Email is corporate/general contact; Email source: https://kegnbottle.com/pages/customers-with-disabilities.
5973 Lusk Blvd · San Diego, CA 92121
Hours Mon-Fri 07:00-22:00; Sat-Sun 09:00-21:00
Official branch page explicitly lists CO2 refills. Keg N Bottle's current CO2 service page says customers bring their own CO2 bottle and it is filled for them. Email is corporate/general contact; Email source: https://kegnbottle.com/pages/customers-with-disabilities.
747 Shadowridge Dr · Vista, CA 92083
Hours Mon-Fri 10:00-17:00; Sat 09:00-12:00; Sun Closed
Official Vista exchange page explicitly says this is exchange-only and customer tanks are not refilled onsite. It lists current CO2 exchange sizes 2.5 lb, 5 lb, 10 lb, and 20 lb. Product pages describe food-grade CO2 and support home draft, sparkling water, and aquarium applications. Email source: https://socalbrewingsupply.com/pages/contact.
5401 Linda Vista Rd #406 · San Diego, CA 92110
Hours Tue-Sat 10:00-20:00; Sun 10:00-18:00; Mon Closed
Official current site explicitly says customers can exchange empty CO2 tanks at Home Brew Mart. Same-cylinder refill is not advertised, so this is classified exchange-only.
1192 Pioneer Way · El Cajon, CA 92020
Hours Mon-Fri 07:00-16:00; Sat-Sun Closed
Official branch page explicitly lists carbon dioxide among industrial and specialty gases. Portable-cylinder refill versus exchange behavior, food-grade status, and supported sizes were not confirmed. Email is corporate/general contact; Email source: https://www.airgas.com/customer-service.
740 Enterprise St · Escondido, CA 92029
Hours Mon-Fri 07:00-16:00; Sat-Sun Closed
Official branch page explicitly lists carbon dioxide among gases available. Portable-cylinder refill versus exchange behavior, food-grade status, and supported sizes were not confirmed. Email is corporate/general contact; Email source: https://www.airgas.com/customer-service.
9010 Clairemont Mesa Blvd · San Diego, CA 92123
Hours Mon-Fri 07:00-16:00; Sat-Sun Closed
Official branch page explicitly lists carbon dioxide among gases carried. Branch-level portable-cylinder refill versus exchange behavior, food-grade status, and supported sizes were not confirmed. Email is corporate/general contact; Email source: https://www.airgas.com/customer-service.
2205 Newton Ave · San Diego, CA 92113
Hours Mon-Fri 07:30-16:30; Sat-Sun Closed
Official current Linde branch page explicitly lists Carbon Dioxide as available at this location. Portable-cylinder refill versus exchange behavior, food-grade status, and supported sizes were not confirmed. The second San Diego Linde location at 9599 Distribution Ave is a dry-ice distribution center and was omitted. Email is corporate/general contact; Email source: https://stores.lindedirect.com/ca/sandiego/.