Bob, I tried water pumping for a while. I’d take my hand pump down to the hot tub, and the water did seem to even out the suction and I never seem to get as much fluid build up, however, it also seemed to me the post pump girth didn’t stay as long as when pumping air. I was only using a cheap hand pump, which I eventually ruined by rusting out the gauge and spring, and I don’t want to do the same with my Kaplan pump. I know alot of the pump sites offer hydro-pumps. I’m sure that the hand pumps that are designed for hydro-pumping may work better, but not in my budget. What do you think about the Mighty-Vac brake bleeding pump everyone talks about for pumping underwater. After all it’s designed to pump liquid and is cheap, about $30.00 at Auto Zone.
Sorry WAY: Guess I high-jacked your thread, but I’m sure you can benefit from this question also.
BG