tankHeightDrainRate = 0.32 / ((48-36) * 60) # T2 started draining at 14:36, expansion tank lost volume at 14:48, initial sensor height was 32cm.
volumeOverTankHeight = (20/1000) / 0.4 # Expansion tank max height is 40cm, max volume is 20L.
tankVolumeDrainRate = tankHeightDrainRate * volumeOverTankHeight
print("The cooling systems are being drained at approximately ", "%.2f"  % (tankVolumeDrainRate * 1000 * 3600), "L/hr respectively.\n")
totalCoolingPackageVolume = 140 / 1000
print("Give the cooling packages each have ", "%.2f" % (totalCoolingPackageVolume * 1000), "L of water,\n", \
      "the systems will drain completely within ", "%.2f" % (totalCoolingPackageVolume/tankVolumeDrainRate / 3600), "hrs.")

The cooling systems are being drained at approximately  80.00 L/hr respectively.

Give the cooling packages each have  140.00 L of water,
 the systems will drain completely within  1.75 hrs.