Pumping into them has not been a problem. I've been pushing the beer out into kegs using CO2 - which works, but was not my initial plan. The initial plan, which I'm still going to do is to build a large box, about 18"~20" tall, to sit both the freezers on. This would elevate them to a point where the fermentors could easily siphon into a keg and create a large cabinet for storage underneath.