This morning Robert noticed water on the floor of the PSL enclosure. Inspection showed the leak to be at the barb fitting on the output side of the Diode chiller filter. There was a bulge in the hose from the hose clamp to the end of the barb. The Teflon inner liner of the hose had failed at the barb, allowing water between the Teflon and the outer rubber, which created the leak.   

   Shutdown the laser and the Diode chiller. Cut out the bad section of hose and reconnected the hose to the filter. Powered up the system and noted no further leaks.