Once someone decides that a kegging setup is right for them, the very next question is usually:
“what is the difference between ball lock and pin lock kegs?”
The answer is pretty simple. The kegs are usually quite similar, but the connection point that the gas and beer lines use is slightly different.
This is an example of a ball lock post
and this is an example of a pin lock post.
Notice the small pins that poke out of the base of the pin lock post. That is why it is named “pin lock”
History
In the past these kegs were used predominantly for soda syrup. Coke used the pin lock kegs and Pepsi used the ball lock kegs. They could have easily used the same system, but it was probably obfuscated in order to discourage restaraunt owners from switching soda companies as well as to keep the kegs circulating in their respective distribution pools.
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