I am going test the system this week. Maybe my evaporation/boil off is crazy high. For the first batch I started of with 7 gallons pre-boil, boiled for 90 minutes and ended up just shy of 5 gallons in the primary. So the next batch I compensated and had 7.5 gallons pre-boil, boiled for 90 and transferred exactly 5 gallons???? Now unless I was just totaly bombed and started drinking the beer from the keggle or a beer fairy sucked it up
I figure with my system(check profile), I would only have maybe .5 gallons left in the CFC/Pump.