That link on the "pulser pump" worked for me; maybe it was some network congestion. Try doing a web search on "pulser pump."
This site is not related to space travel. It's by someone who's built these type of pumps and advocates their use in Third World contries because of their simplicty: runs on gravity, no electrical power required, very few if any moving parts.
I'm curious if they can be scaled up to pump a liquid to kilometer scale heights. That link on "hydraulic ram pumps" gives heights and efficiencies for water pumped up to meter scale heights. Would similar efficiencies work at the kilometers scale?
I found this page that gives the weight of the shuttle fully loaded and fully unloaded:

Space Shuttle Basics
"Weight
At liftoff: 2,041,166 kilograms (4.5 million pounds)
End of mission: 104,326 kilograms (230,000 pounds)"
http://spaceflight.nasa.gov/shuttle/reference/basics/

That 4.5 million pounds comes mostly from the fuel, the external tank, and the attached boosters and their fuel. Compare that to the 230,000 pounds at landing. Even with the 63,500 pound max. payload that's still less than 300,000 pounds.
So what about not carrying that fuel onboard?

Bob Clark