To answer the original question, the transfer pump from those fuel station things will pump WMO like a mad man!
I have one, without the big tanks, just the 24v pump setup. It will pump insane amounts of fluid, and make an equally insane mess, all in a matter of moments.
BUT, they can be a PITA to prime.
If you can pump from the bottom of a tote, or something else like that with a valve at the bottom, then this pump works excellent. But they are very poor at self priming with the heavier WMO.
They can do a fair job at priming with thin fluids like gas, diesel, water, etc. The little hand pump helps, but you have to prime a LOT of the line before the pump will keep the prime on thicker fluids. Otherwise it cavitates too much.
Btw, once it does have prime, it can pump a full tote of WMO in a couple short minutes!
That being said, unless you can EASILY prime it, they are only worth messing with if you are going to pump large amounts of fluids.
I do love mine though....
