Vis Pump is in the ThaumCraft2.1.6,Yogbox is useing ThaumCraft2.0.2 This is here in hope of an upgrade from the Yogbox staff. Sorry, but its here if you want to look at it.
This device sets up a constant flow of vis or taint in a series of Vis Conduits. Suction is only applied from the front of the device (the end with the pumping animation). It has a small internal store for any vis or taint it has pumped. To extract vis from this store you need to connect conduits to its back which in turn needs to connected to some suction causing device. You can use a series of pumps to move vis over large distances.
Vis Pumps apply a suction of 20 TCB from their front, though this can be increased by connecting bellows next to them. The pumps orientation can be changed with the Arcane Tinkering Tool.