The drain outlet is not much higher than the top of the Barker. In fact, the drain hose does a little ~ bend but I think the force of the liquid pushes it out just fine. Since my TT tank is larger than the capacity of the Barker, it won't empty completely but it's a good balance for me. It gets me back to about 1/3 full without the Barker being overly large and cumbersome to haul.
Just picked up the truck last month and I only have one trip with the TT under my belt but it pulls like a dream. I went with the HD Payload option that gives me around 2450 lbs of cargo capacity, heavier springs, brakes, shocks, etc.
We're taking a 5k mile trip later this month so when I get back, I'll be able to give you a much better review.
Mike, Sue, Sissy and Little Man
2015 Ford F350 Lariat FX4 6.7 CC DRW
2015 Eagle Premier 351RSTS