After twenty four hours, the closed system remains at 100psi--see attached image.

A few other images to remind staff:

The second image shows the west side of BSC8.  There are supply and return lines running to distribution manifolds which step the tube down from 1" to 1/2".  Two 1/2" supply and two 1/2" return lines run over toward and up each pier for the horizontal and vertical Actuators located in the HEPI Housing at the top of each pier.  This is all duplicated on the East side of the BSC.
The next image zooms in; the pressure gauge and the purge valve horizontally opposite will be exchanged for Supply and Return pressure sensors.  These will be used for Pump Station Servo control.
Image 4 (007) shows the 1/2" lines running up close to the BSC to were it turns to connect to the four-way valve at the top of the SEI Pier.  This is were the system transitions to the flex hose connected to the HEPI Actuators.  The four-way valve also allows the main system to be run in recirculation mode while the Actuator remains isolated.

***The system is now in recirculation mode and must NOT be changed***
We will keep the system in recirculation mode for several weeks while we flush and bleed the new plumbing.
***Again--do NOT operate the HEPI Four-way valves***

Going toward the Mezzinine from BSC8, there is a pair of drain valves just East of HAM4--see image 5.  Again, please don't exercise these valves if you don't want to dump HEPI fluid on the floor.

OK, I'll let you go with the last shot.  These are the valves just entering the LVEA where we'll be able to disconnect the temporary plumbing to remove it for the full build.  There are also drain valves at the bottom of this expansion bite.