Maps piles welding suppliers, homebrew shops, and grocery swap racks together and never says which one fills your cylinder. This is the sorted version, every spot checked, with the three things Maps hides.
25verified spots
7refill your tank
9food grade
Sorted for you: places that refill your own tank come first, then the most complete, confirmed listings. Exchange-only and unconfirmed spots follow.
KeyRefillBothExchangeConfirm
Central Welding Supply
Refill + Exchange
2313 NE Martin Luther King Jr Blvd · Portland, OR 97212
ServiceRefill + Exchange
Food gradeYes
Tank sizes20lb
Your cylinderYes, refills yours
homebrewsodawelding
Hours Mon to Fri 8am to 5pm; Sat 9am to 2pm; Sun closed
Official Portland page lists a CO2 fill station. Company beverage gas program confirms certified food grade 100% CO2 and cylinder exchange. 20lb exchange is reported locally; ask about other sizes.
Hours Mon to Fri 10am to 6pm; Sat 9am to 5pm; Sun 10am to 4pm
Immediate swaps are available seven days. If you want your own bottle back, Bader can refill it in about 1 to 5 days. Hydro test fees can apply to out of date cylinders.
Hours Tue to Fri noon to 6pm; Sat 9am to 6pm; Sun and Mon closed
Listings explicitly advertise CO2, kegerator and SodaStream new style valve fills. A customer reports refilling a 10lb tank for SodaStream use. Food grade is not confirmed.
Hours 24 hour service listing; commercial account model
Commercial beverage gas service rather than a normal walk in cylinder counter. NuCO2 confirms certified beverage grade CO2. Best suited to routed commercial accounts and bulk systems.
Hours Mon to Thu 11am to 9pm; Fri 11am to 10pm; Sat 10am to 10pm; Sun 11am to 8pm
Business site explicitly advertises CO2 tank refills and says non homebrewing tanks are also accepted. The refill page is older, so call ahead to confirm current service and sizes.
Official branch page confirms CO2. A January 2026 retail review reports buying a 20lb CO2 cylinder for SodaStream use, and a 2024 review specifically references food grade CO2 for home kegerators.
Portland, OR · delivery / mail-in, no walk-in counter
ServiceExchange
Food gradeYes
Tank sizes60L screw in, 60L quick connect, 130L screw top
Your cylinderYes, refills yours
soda
Hours Order online; local delivery routes vary by neighborhood
Portland delivery service. Cylinders are refilled locally, but the customer experience is an empty for full exchange. Food grade CO2 is explicitly confirmed.
Branch lists beverage and food grade gases. Local homebrew report describes a 10lb CO2 exchange. Ask for current size availability and exact grade before pickup.
Hours Tue to Fri 11am to 6pm; Sat 10am to 6pm; Sun and Mon closed
Official page says Mainbrew does not fill customer tanks and instead exchanges them. Food grade CO2 is confirmed in its kegging information. Supply can be limited, so call ahead.
Current local reports describe Airgas as exchange only rather than an on site fill. A 5lb exchange is specifically reported. Confirm beverage grade and stock before visiting.
Current branch listing confirms CO2. A customer review specifically reports a 20lb CO2 cylinder for home soda refills and returning for exchanges. Call ahead for food grade confirmation.
Hours Mon to Fri 9am to 8pm; Sat and Sun 9am to 6pm
Bi-Mart explicitly sells a 60L SodaStream exchange cylinder and requires an empty cylinder for the exchange price. Local Portland reports confirm exchanges at this store.
Bubba Bubble currently lists Cherry Sprout as a retail partner. Bubba confirms food grade CO2. Partner inventory by cylinder connector and size is not published, so call ahead.
Current Bubba Bubble retail partner for CO2 cylinder exchanges. Bubba explicitly uses food grade CO2. Call ahead for quick connect versus screw in inventory.
Official branch page confirms carbon dioxide. Portland homebrew reports describe Airgas as exchange only. Call ahead for CO2 cylinder size and beverage grade.
Official branch page confirms carbon dioxide. A 2023 review describes an easy CO2 exchange. Reviews also warn that desired cylinder sizes can be out of stock.
Portland, OR · delivery / mail-in, no walk-in counter
ServiceExchange
Food gradeCall to confirm
Tank sizesAsk when you call
Your cylinderYes, refills yours
soda
Hours Mon to Fri 9am to 5pm; by appointment
Doorstep exchange for home soda machine cylinders. Listings describe recharged replacement cylinders in exchange for customer empties. Confirm connector compatibility.
Hours Mon to Fri 8am to 4:30pm; Sat and Sun closed
Official gas department lists carbon dioxide, beer gas mixes, bulk gas service and delivery in multiple sizes. Consumer cylinder refill versus exchange is not stated.
Hours Mon to Fri 8am to 4:30pm; Sat and Sun closed
Legacy Portland reports describe customer CO2 fills, and Oregon records show current CO2 pressure vessel activity at the site. The current business site only clearly confirms cylinder hydrotesting and CO2 fire suppression work. Call before making a trip.