Double acting gear reduction pumping system. I could have wished that the drive pulley were a bit bigger in diameter for more leverage and reduction, which may or may not prove to be desirable.
I do have a couple that I'm almost embarrassed to say how little I paid for them.
However, I still have not hooked them up and given them any kind of a test.
It is my hope that they will provide adequate pressure to work as a boiler feedwater pump, but if not, then perhaps they will be destined to form the heart of a fountain of some sort?!?!
I could have written the same thing Daniel did. Have one , never hooked it up yet.