15 gallon Red Wing with spigot and float

Question:

Hello,
 
Attached are three pictures of my 15 gallon Red Wing I recently purchased. This crock is in perfect shape along with the lid. The lid I believe is called a pedal lid? It has the number 15 in one of the pedals. The side spigot has a tube like going down to a glass ball. The basket is there so the glass ball will not break. Do you know what this is for? I also wanted to know if you have a value to this item?
 
Thanks,
Jessica

Answer:

This 15 gallon Red Wing crock was used either at a chemical company or even a university.  I do not know how this ball & tubed worked.   Now for value.  A perfect 15 gallon Red Wing lid is between $200 & $225.  Your 15 gallon crock is between $150 & $175.  Hope this helps.  Al Kohlman