This is pure fluid full adder(a component of a computer which adds two numbers together), it was "ripped" from the following patent: http://www.google.com/patents?id=fmRiAAAAEBAJ&zoom=4&dq=fluidic%20adder&pg=PA3#v=onepage&q&f=false

It is not designed for high speed operation and the output ports are probably not impedance matched. It is highly recommended that output be amplified as this circuit contains a great deal of "passive" elements(no integral fluidic amplifiers).

It has been printed, but it has not been tested.

Print fluidic circuit plate and manifold plate, attach manifold plate to circuit plate, use M5 nuts and bolts to hold plates together. Hook up according to Fig 1.

Print a bunch of these and make a fluidic computer! Or an interactive fountain that shows how an adder works... Or just extract the fluidic logic gates. That XOR(oval looking thing on circuit) might be worth making into a logic block by itself.