Every CO2 supplier we could find in the Buffalo area (New York) was checked one by one, and 10 of them made the list. 3 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. 3 would not confirm either way, so those are marked call to confirm rather than guessed at. The common sizes here are 20lb, 5lb, 7oz to 100lb; most cover soda, welding, industrial.
10places listed
3confirmed refill
0confirmed 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
Trost Fire Equipment
Refill
3710 Walden Ave · Lancaster, NY 14086
ServiceRefill
Food gradeCall to confirm
Tank sizes7oz to 100lb
Your cylinderYes, refills yours
fire protection
Hours Mon-Fri 08:00-16:30; Sat-Sun Closed
Official current service and contact pages verify the Lancaster location, phone, hours, and explicit CO2 filling service for cylinders from 7 oz through 100 lb. Included despite fire-protection focus because CO2 cylinder filling is explicitly offered. No reliable public customer email or food-grade designation was verified.
Hours Mon 12:00-19:00; Tue-Thu by appointment; Fri 12:00-18:00; Sat 09:00-17:00; Sun 09:00-14:00
Official current site explicitly says Buffalo Scuba fills CO2 cylinders for beverage, airsoft, hydroponics, and fish-tank applications. Official contact information verifies the Hamburg location, phone, email, and current schedule. Food-grade status and exact supported cylinder sizes were not published.
Current official Strate site verifies the Buffalo location and hours, and current site testimonials explicitly describe customers getting kegerator CO2 tanks filled. Maine Oxy acquired Strate effective December 31, 2024, but the Strate Buffalo site remains active. BBB has conflicting stale/out-of-business information, so the current official operating site and 2025 acquisition evidence were favored. No explicit food-grade designation or supported refill sizes were verified.
Current business information verifies the Main Street location, phone, email, and daily hours. A CO2 advertisement posted March 1, 2026 and updated August 12, 2026 explicitly offers 20 lb CO2 tanks and says 'we swap the tanks,' supporting exchange-only classification and a 20 lb supported exchange size. Food-grade status was not verified.
Official current branch page verifies the Broadway location, phone, and hours. Fresh November 2025 Buffalo community evidence says this location will not refill the customer's same cylinder but will exchange CO2 cylinders and specifically mentions 5 lb CO2 used for a planted aquarium. The email is Linde's official corporate customer-contact email. Food-grade status was not explicitly verified.
Official current branch page verifies the Buffalo store, phone, hours, and carbon dioxide availability. Fresh November 2025 Buffalo community evidence describes the Broadway Airgas service as cylinder exchange rather than same-cylinder refill. The email is Airgas's official corporate customer-service address because no branch-specific public email was verified. Food-grade status and exact exchange sizes were not established.
Hours Mon-Fri 11:00-18:00; Sat 12:00-18:00; Sun 12:00-17:00
Current local business evidence verifies the Orchard Park location, phone, website, and hours. Fresh November 2025 Buffalo community evidence specifically states that Green Zone Hydroponics does CO2 tank exchange and describes using one of its exchanged tanks with a SodaStream adapter. No reliable public email, explicit food-grade designation, or exact exchange sizes were verified.
Current business evidence verifies the Buffalo physical operation and cylinder CO2, bulk CO2, and beer-gas supply for bars and restaurants. Fresh November 2025 community evidence also recommends Irish Carbonic for local CO2 needs. Public current evidence does not clearly distinguish same-cylinder refill from exchange, so service_type and accepts_customer_tanks remain unknown. No reliable public email, explicit food-grade designation, or supported cylinder sizes were verified.
Linde Welding Gas & Equipment Center - Great Arrow
Call to confirm
85 Great Arrow Avenue · Buffalo, NY 14216
ServiceCall to confirm
Food gradeCall to confirm
Tank sizesAsk when you call
Your cylinderAsk
weldingindustrial
Hours Mon-Fri 07:30-16:00; Sat-Sun Closed
Official current branch page verifies the Great Arrow location, phone, hours, and explicitly lists Carbon Dioxide among available gases. Fresh November 2025 Buffalo community evidence also identifies this branch as a local CO2 source. The email is Linde's official corporate customer-contact email. Portable refill versus exchange behavior, food-grade status, and supported cylinder sizes were not established.
Hours Mon-Fri 07:30-16:30; Sat 09:00-12:00; Sun Closed
Official current branch page verifies the Hamburg retail gas location, phone, hours, and explicitly lists Carbon Dioxide among available gases. The email is Linde's official corporate customer-contact email because no branch-specific public email was verified. Portable refill versus exchange behavior, food-grade status, and supported cylinder sizes remain unknown.