i used to work in the kitchen at the paul a dever school. everyone is close. those pots were used to make soups, yes, hot cereal, lots and lots of frozen broccoli and other frozen vegetables, clam chowder, corn chowder. the turn-vavles that you see to each of the kettles to the right was to tip the kettles after it was thoroughly washed where the floor drains that you see to discard the dirty wash water. yes, they were very very clean. when i had time to myself, i even helped the cooks finish up before the end of my shift.