homebrew = corny keg = cornelius keg

Fluid out from the top.

the commercial connector.

There exist other “Sanke” connectors, each with a letter. USA standardized on S, and I dare you to *try* and order a commercial keg that takes something else (given how much the concept of ordering a keg is an offensive concept to silk maggots). The other Sanke letters, I'm pretty sure, also use a “fluid out the top”.

a.k.a. Ball Lock Cornelius Keg, or Ball Lock homebrew keg, or pepsi homebrew keg. that's what I use. The gas post should be notched, or have some kind of non-standard marking. the fluid post should be extremely normal.

There's also “pin lock”. “ball lock” and “pin lock”, are sometimes called pepsi and coke, respectively. From when soda was delivered in a keg. pretty sure i asked my dad and it's from before *his* time.

• Pin lock kegs have pins on the post, so the connector is not interchangeable.
• the lids are interchangeable. You want the ones that have a pull tab on them to vent pressure.
• pin lock connectors tend to be half an inch taller.