The horizontal HEPI Actuator on the Northwest Corner of BSC8 was replaced under WP 3059.
We shut the Pump Stations off to zero the pressure.  Isolated the Actuator with the 4-way valve.  Swapped the Valve (4 screws).  Put the Actuator in Bleed Mode.  Put the Actuator back in the system and restarted the Pump.  We drop out of bleed mode tomorrow-Wednesday and look for improvement.