CORNELIUS UF-1 VALVE PARTS SPOOL 3.0 SODA/WATER (FLOW CONTROL)
This flow control soda/water spool is used to regulate the flow of soda/water. It works together with the pressure set at the regulator for the carbonator (soda) or for water, the water pressure from the building against the tension set on the spring inside of the spool, set by the operator/technician.
Often replaced when the outside of it is scratched. Not allowing it to be slid in and out of the sleeve freely.