Ok, the results are in.
Test 1:
I put 1-2 gallons in my kettle on the ground, hooked the pump to the ball valve via 3' of 5/8" ID hose with 5' of the same hose on the output side of the pump. It pushed right around 4.5' vertical, give or take an inch.
Test 2:
I put 2 kettles on turkey fryers and filled one to the top with water (20.5 gallons). Hooked the same hoses to the ball valves and transferred the water from one to the other. It worked flawlessly and took about 5 minutes. Pump was on the ground and the ball valves were at about 14".
Test 3:
Left one kettle with 20.5 gallons of water (on a turkey fryer) on the ground and put the other on the tailgate of my truck (on a turkey fryer) and transferred 20.5 gallons to the kettle on my tailgate. This took about 10 minutes. The last 5 gallons or so was slow taking about 1/2 of the total transfer time. The pump was on the ground, the ball valve of the higher kettle was at about 45", the top of that kettle was at about 62". I was surprised it was able to transfer the full amount actually.
Test 4:
20.5 gallons of water in the kettle, on a turkey fryer on the ground. Pump on the ground. Pumped the full amount through a 25' counterflow chiller (3/8" copper) in about 25 minutes. The configuration was kettle>pump>CFC. I have enough copper to make another CFC which I could "tee" after the pump to further reduce the cooling time.
I think this pump will do everything I need it to. Probably not the best choice for someone looking to use a pump to fill a HLT (5'+ off the ground) in a gravity (3 tier) system. I'm moving away from my 3 tier system anyway so this will work just fine for my needs.
Hope this helps!!!