spit valve

spit valve

n. Informal
A water key.
References in periodicals archive ?
I grabbed one for my trumpet's spit valve and stuck it in my backpack.
These state efforts go a good way toward helping many more students get where they want to be: in a college classroom, whether that room has beakers and smells, the contents of emptied spit valves on the floor, or just the makings of a great preparation for the future.