Used Beer Kegs FAQ

What's the difference between a half barrel, quarter barrel, and sixth barrel keg?

The names refer to volume relative to a US "barrel" of beer, which is 31 gallons:

• Half barrel (1/2 BBL): 15.5 gallons / ~165 12oz beers. The standard size at bars, restaurants, and most commercial taps. About 23.5" tall and 16" diameter, weighing ~30 lbs empty and ~160 lbs full.
• Quarter barrel ("pony keg"): 7.75 gallons / ~82 12oz beers. Same diameter as a half-barrel but shorter (~13.75" tall). Common at smaller venues and parties.
• Sixth barrel ("sixtel" or "slim quarter"): 5.16 gallons / ~55 12oz beers. Tall and skinny (~23.5" tall but only ~9.25" diameter). The craft brewery favorite — fits more variety taps in less space.

Each has a different role in the supply chain. Half-barrels dominate volume distribution; sixtels dominate craft and rotating-tap programs. For full specs and pickup-friendly buying tips, see our keg size guide.

Are Cornelius (corny) kegs and beer kegs the same thing?

Mechanically similar, practically different. Both are pressurized stainless steel vessels for serving carbonated liquid, but they came from different industries:

• Sankey kegs (half-barrel, quarter-barrel, sixtel) were designed for the commercial beer industry. They use a single valve at the top — the Sankey D coupler — that handles both gas-in and beer-out through one connection.
• Cornelius "corny" kegs were originally manufactured for soda bottlers to serve syrup. They use two separate posts on top — one for gas-in (CO2) and one for liquid-out — with quick-disconnect fittings. Ball-lock and pin-lock variants exist because different bottlers used different lock styles.

When the soda industry switched to bag-in-box syrup systems in the 1990s, millions of corny kegs hit the secondary market. Homebrewers adopted them because they hold roughly 5 gallons (a standard homebrew batch), they're easy to disassemble for cleaning, the fittings are cheaper and simpler than Sankey couplers, and they were never tied to brewery deposit systems so they trade freely without legal complications.

You can put beer in a Sankey, soda in a corny, kombucha in either, or homebrew in either — the vessel doesn't care what's inside. The real difference is the fitting type and the legal/ownership history.

How long do beer kegs last?

A well-maintained stainless steel keg can last 20–30 years in commercial circulation before being decommissioned, and significantly longer in low-cycle homebrew use. The metal itself doesn't really wear out — 304-grade stainless is the same material used in food-processing tanks rated for decades of service. What actually kills kegs is component failure:

• Pressure relief valves and spears wear out from repeated cleaning cycles and high-pressure CO2 exposure. Replacement parts cost $15–$40 and bring most kegs back to serviceable condition.
• Dents affect resale value but rarely affect function. Major dents that compromise wall thickness or seam integrity are the exception.
• Tag and labeling damage matters only for return-for-deposit. Once a keg loses its identification, breweries won't accept it back even if it's theirs.

For a used keg purchase, the keg's age matters less than its current condition. A 15-year-old keg with fresh valves and no dents will outperform a 3-year-old keg with corroded seals. When buying, prioritize working pressure-test certification over manufacture date.

Can you buy used beer kegs?

Yes, but it's worth understanding what you're actually buying. Most beer kegs in commercial circulation are still owned by the brewery that filled them — when you pay a "keg deposit" at a distributor, you're not buying the keg, you're leaving collateral against its return. Brewers Association loss estimates for unreturned kegs run into the tens of millions of dollars a year, and selling a deposit keg to a scrapyard is treated as theft in most states.

That said, there's a legitimate secondary market for used kegs that ends up here for a few specific reasons:

• Retired brewery inventory. Breweries decommission older kegs that fail pressure testing, have dents that fail QC, or use legacy valve fittings they no longer support. These are sold off in lots.
• Brewery closures. Asset liquidations dump large numbers of branded and unbranded kegs onto the market.
• Cornelius ("corny") kegs. Originally soda-syrup vessels from Coca-Cola and Pepsi bottlers, these were never tied to beer deposit systems and trade freely. They're the workhorse keg of the homebrew world.
• Manufacturer surplus and new old stock. Kegs that were produced but never deployed to a brewery.

You can find these on our local listings, through eBay (we surface live affiliate inventory throughout the site), at brewery auction houses, and through homebrew supply shops that buy retired commercial stock. Verify provenance before you buy, especially on Sankey D kegs with brewery markings.

How much does a used beer keg cost?

Pricing varies by type, condition, and location, but here's where the market typically lands:

• Half-barrel (1/2 BBL) Sankey kegs: $70–$130. The most common commercial keg and the easiest to find.
• Quarter-barrel (pony keg): $55–$95. Less common in the used market since they were never as widely deployed.
• Sixth-barrel ("sixtel"): $40–$90. Popular with craft breweries and small bars — strong resale demand.
• Cornelius/corny kegs (5-gallon): $40–$80. The homebrewer's choice. Ball-lock versions are slightly more common and slightly cheaper than pin-lock.

Premium pricing applies to kegs that are unbranded (legally cleanest), recently pressure-tested, or sold with valves already swapped to ball-lock fittings for homebrew use. Prices on eBay tend to run 10–20% above local because shipping is baked in — keg shipping runs $40–$80 per keg, which is why local pickup dominates this market. Check our local listings for current prices in your area.

Is it illegal to sell beer kegs?

It depends entirely on whether you own the keg or are holding someone else's collateral:

• Selling kegs you legitimately own — your own homebrew kegs, Cornelius kegs from the soda secondary market, retired brewery surplus you purchased, manufacturer overstock — is fully legal and exactly what usedbeerkegs.com facilitates.
• Selling kegs that belong to a brewery is theft of property. When you pay a $20–$50 deposit at a distributor, you're not buying the keg — you're leaving collateral against its return. The keg remains the brewery's property. Selling a deposited keg to a scrapyard or third party is treated as theft of brewery property in every state.

Texas, Kentucky, North Carolina, Massachusetts, California, and many other states have specific keg-theft statutes, with penalties ranging from misdemeanor fines to felony charges depending on the value involved. State scrap-metal laws additionally require scrap yards to verify ownership before accepting kegs, specifically to slow this kind of theft.

The simple rule: if the keg has a brewery name, logo, or stamping on it and you can't prove you bought it from the brewery directly, return it through a distributor for the deposit refund instead of trying to sell it.

Are empty kegs worth any money?

Yes — more than most people expect. A used half-barrel Sankey keg in working condition typically sells for $70–$130, sixth-barrel ("sixtel") kegs run $40–$90, and Cornelius/corny kegs land in the $40–$80 range. Even at scrap, a half-barrel keg carries roughly $30–$50 in stainless steel value, which sets a floor under the market.

A few factors drive the value:

• Material cost. Kegs are made from 304-grade food-safe stainless. New kegs run $150–$180 wholesale, so used inventory in good shape stays well above scrap.
• Pressure rating. Kegs are certified pressure vessels. The DOT-grade build quality is hard to replicate, which is why homebrewers, kombucha producers, cold-brew coffee operations, and small-batch beverage businesses keep buying them up.
• Brewery deposit refunds. If you legitimately have a brewery's keg with the tag intact, returning it through the distributor usually nets a $20–$50 deposit refund. This isn't selling — it's recovering collateral.

If you're holding empties and wondering what to do with them, our keg size guide covers exact specs and current market ranges by size.

Where can I get rid of beer kegs?

In rough order of return:

1. Return to the brewery or distributor. If the keg has a brewery tag and you have proof of deposit, return it. You get your deposit back, and the keg goes back into legitimate circulation. This is the right answer for the vast majority of kegs people accidentally end up with.
2. List them on usedbeerkegs.com. Free local listings, geo-targeted to nearby homebrewers and small operators who actively want used kegs. List once, pickup is local, no shipping headaches.
3. Sell to homebrewers directly. Corny kegs especially have a steady local market — homebrew club forums, Facebook groups, and local supply shops are good outlets.
4. Homebrew supply shops. Some shops buy used kegs outright or take them on consignment. Call before you haul.
5. Scrap yard — last resort. A scrap yard pays the metal value only, well below the resale market. Many states (Texas, Kentucky, North Carolina, and others) now require proof of ownership before a scrap yard can accept a keg, specifically to slow keg theft.

What to avoid: leaving them curbside, dumping them, or selling someone else's branded kegs for scrap. The last one is a felony in most jurisdictions.

Where can I take empty beer kegs?

Same hierarchy as above, framed by physical drop-off:

• The original brewery or your local distributor — best outcome if the keg has a tag. They'll process the deposit refund.
• A local homebrew shop — many accept walk-ins for corny kegs and unbranded Sankeys.
• A buyer arranged through usedbeerkegs.com — most local transactions happen as pickup-only because keg shipping costs $40–$80 per keg and kills the economics.
• A licensed scrap metal recycler — bring ID and, in many states, proof of ownership.

If the keg is branded and you don't know which brewery, our valve fitting guide can help identify the manufacturer style, but the brewery name stamped or embossed on the keg shell is the fastest path to returning it.

Can homebrewers use commercial Sankey kegs?

Yes, with a couple of practical considerations. The Sankey D fitting that commercial kegs use is more complex than the ball-lock or pin-lock fittings on corny kegs, but it's not exotic — Sankey couplers are widely available from any homebrew supplier for $25–$50.

Three setup paths:

• Use the original Sankey valve. Buy a Sankey D coupler with separate gas-in and beer-out connections that mate to your CO2 line and beer line. Works exactly like a bar setup. Cleaning is harder because the spear assembly is fixed inside the keg — you'll need a keg-cleaning loop or chemical recirculation rig.
• Swap the Sankey valve for a ball-lock conversion. Drop-in conversion kits replace the Sankey fitting with ball-lock posts. About $30–$60 per keg. Best of both worlds — commercial keg volume with homebrew fittings.
• Use the keg as a fermenter. Many homebrewers buy used 1/2 BBL Sankeys specifically as 15-gallon fermenters for larger batches, leaving the Sankey valve in place since cleaning is more straightforward when the keg is opened at the top for fermentation.

The main downside of Sankey kegs for homebrew use is size — a half-barrel is 15.5 gallons, three times the standard homebrew batch. Sixth-barrel Sankeys (5 gallons) are a better volume match for typical recipes and are increasingly popular as conversion candidates. Check the valve fitting guide for compatibility details before buying.