What was found
WHILE CREW WAS READYING THE ACFT FOR DEPARTURE, APU AIR WAS SELECTED ON AND COFFEE MAKER'S WATER FILLER SPIGOT STARTED RUNNING AND OVERFILLING THE COFFEE POT. WATER STARTED RUNNING ONTO FLOOR BEFORE SYS WAS SHUTDOWN. THE SPIGOT HAS A SPRING LOADED PUSHBUTTON WHICH MUST BE PUSHED TO ALLOW WATER TO FLOW. BUTTON WAS AT REST BUT STILL FLOWED WATER AS SOON AS WATER SYS WAS PRESSURIZED. WATER SYS FOR GALLEY HAD TO BE SHUTOFF TO STOP FLOW OF WATER. THIS HAS HAPPENED SEVERAL TIMES IN THE LAST FEW YEARS ON OTHER AIRCRAFT IN WHICH SPIGOT REPLACEMENT CURED THE PROBLEM.